102312131 has 4 divisors (see below), whose sum is σ = 107697000. Its totient is φ = 96927264.

The previous prime is 102312083. The next prime is 102312139. The reversal of 102312131 is 131213201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102312131 is a prime.

It is a super-2 number, since 2×102312131² = 20935544299522322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102312139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2692406 + ... + 2692443.

It is an arithmetic number, because the mean of its divisors is an integer number (26924250).

Almost surely, 2^102312131 is an apocalyptic number.

102312131 is a deficient number, since it is larger than the sum of its proper divisors (5384869).

102312131 is an equidigital number, since it uses as much as digits as its factorization.

102312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5384868.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 102312131 is about 10114.9459217536. The cubic root of 102312131 is about 467.7089818432.

Adding to 102312131 its reverse (131213201), we get a palindrome (233525332).

The spelling of 102312131 in words is "one hundred two million, three hundred twelve thousand, one hundred thirty-one".