102612512531 has 4 divisors (see below), whose sum is σ = 103765462200. Its totient is φ = 101459562864.

The previous prime is 102612512491. The next prime is 102612512549. The reversal of 102612512531 is 135215216201.

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 102612512531 - 2⁶ = 102612512467 is a prime.

It is a super-2 number, since 2×102612512531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102612512494 and 102612512503.

It is not an unprimeable number, because it can be changed into a prime (102612512591) 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, 576474701 + ... + 576474878.

It is an arithmetic number, because the mean of its divisors is an integer number (25941365550).

Almost surely, 2^102612512531 is an apocalyptic number.

102612512531 is a deficient number, since it is larger than the sum of its proper divisors (1152949669).

102612512531 is an equidigital number, since it uses as much as digits as its factorization.

102612512531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152949668.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 102612512531 its reverse (135215216201), we get a palindrome (237827728732).

The spelling of 102612512531 in words is "one hundred two billion, six hundred twelve million, five hundred twelve thousand, five hundred thirty-one".