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123303102031 = 196489636949
BaseRepresentation
bin111001011010101110…
…0000000011001001111
3102210021012112120122201
41302311130000121033
54010011043231111
6132351125222331
711623365034324
oct1626534003117
9383235476581
10123303102031
114832442860a
121ba91b619a7
13b820614605
145d79cccb4b
153319e6c6c1
hex1cb570064f

123303102031 has 4 divisors (see below), whose sum is σ = 129792739000. Its totient is φ = 116813465064.

The previous prime is 123303102029. The next prime is 123303102049. The reversal of 123303102031 is 130201303321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123303102031 - 21 = 123303102029 is a prime.

It is a super-2 number, since 2×1233031020312 (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 6489636949 = 123303102031 / (1 + 2 + 3 + 3 + 0 + 3 + 1 + 0 + 2 + 0 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123303102011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3244818456 + ... + 3244818493.

It is an arithmetic number, because the mean of its divisors is an integer number (32448184750).

Almost surely, 2123303102031 is an apocalyptic number.

123303102031 is a deficient number, since it is larger than the sum of its proper divisors (6489636969).

123303102031 is an equidigital number, since it uses as much as digits as its factorization.

123303102031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489636968.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 123303102031 its reverse (130201303321), we get a palindrome (253504405352).

The spelling of 123303102031 in words is "one hundred twenty-three billion, three hundred three million, one hundred two thousand, thirty-one".

Divisors: 1 19 6489636949 123303102031