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123133031 = 722512919
BaseRepresentation
bin1110101011011…
…01110001100111
322120200210202122
413111231301213
5223010224111
620115100155
73023420300
oct725556147
9276623678
10123133031
116356173a
12352a165b
131c682ca8
14124d37a7
15ac23cdb
hex756dc67

123133031 has 6 divisors (see below), whose sum is σ = 143236440. Its totient is φ = 105542556.

The previous prime is 123133019. The next prime is 123133067. The reversal of 123133031 is 130331321.

Adding to 123133031 its reverse (130331321), we get a palindrome (253464352).

It is not a de Polignac number, because 123133031 - 26 = 123132967 is a prime.

It is a super-2 number, since 2×1231330312 = 30323486646493922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123133081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1256411 + ... + 1256508.

It is an arithmetic number, because the mean of its divisors is an integer number (23872740).

Almost surely, 2123133031 is an apocalyptic number.

123133031 is a deficient number, since it is larger than the sum of its proper divisors (20103409).

123133031 is an equidigital number, since it uses as much as digits as its factorization.

123133031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512933 (or 2512926 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 123133031 is about 11096.5323862908. The cubic root of 123133031 is about 497.4982109815.

The spelling of 123133031 in words is "one hundred twenty-three million, one hundred thirty-three thousand, thirty-one".

Divisors: 1 7 49 2512919 17590433 123133031