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1010243231 = 7912787889
BaseRepresentation
bin111100001101110…
…001011010011111
32121101221200011222
4330031301122133
54032110240411
6244125003555
734014632354
oct7415613237
92541850158
101010243231
1147928a768
122423b35bb
131313b567a
149825662b
155da564db
hex3c37169f

1010243231 has 4 divisors (see below), whose sum is σ = 1023031200. Its totient is φ = 997455264.

The previous prime is 1010243209. The next prime is 1010243249. The reversal of 1010243231 is 1323420101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323420101 = 3142690971.

It is a de Polignac number, because none of the positive numbers 2k-1010243231 is a prime.

It is a super-2 number, since 2×10102432312 = 2041182771562638722, 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 (1010243291) 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, 6393866 + ... + 6394023.

It is an arithmetic number, because the mean of its divisors is an integer number (255757800).

Almost surely, 21010243231 is an apocalyptic number.

1010243231 is a deficient number, since it is larger than the sum of its proper divisors (12787969).

1010243231 is an equidigital number, since it uses as much as digits as its factorization.

1010243231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12787968.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1010243231 is about 31784.3236674937. The cubic root of 1010243231 is about 1003.4028180289.

Adding to 1010243231 its reverse (1323420101), we get a palindrome (2333663332).

The spelling of 1010243231 in words is "one billion, ten million, two hundred forty-three thousand, two hundred thirty-one".

Divisors: 1 79 12787889 1010243231