102312155439 has 12 divisors (see below), whose sum is σ = 159152241976. Its totient is φ = 62961326352.

The previous prime is 102312155423. The next prime is 102312155447. The reversal of 102312155439 is 934551213201.

It is a happy number.

102312155439 is a `hidden beast` number, since 1 + 0 + 2 + 3 + 1 + 215 + 5 + 439 = 666.

It is not a de Polignac number, because 102312155439 - 2⁴ = 102312155423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102312155419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437231317 + ... + 437231550.

Almost surely, 2^102312155439 is an apocalyptic number.

102312155439 is a deficient number, since it is larger than the sum of its proper divisors (56840086537).

102312155439 is a wasteful number, since it uses less digits than its factorization.

102312155439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874462886 (or 874462883 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 102312155439 in words is "one hundred two billion, three hundred twelve million, one hundred fifty-five thousand, four hundred thirty-nine".