102173931 has 18 divisors (see below), whose sum is σ = 152860500. Its totient is φ = 65762256.

The previous prime is 102173879. The next prime is 102173941. The reversal of 102173931 is 139371201.

It is not a de Polignac number, because 102173931 - 2⁶ = 102173867 is a prime.

It is a super-2 number, since 2×102173931² = 20879024351985522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102173895 and 102173904.

It is not an unprimeable number, because it can be changed into a prime (102173941) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 820 + ... + 14318.

It is an arithmetic number, because the mean of its divisors is an integer number (8492250).

Almost surely, 2^102173931 is an apocalyptic number.

102173931 is a deficient number, since it is larger than the sum of its proper divisors (50686569).

102173931 is a wasteful number, since it uses less digits than its factorization.

102173931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13563 (or 13531 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 102173931 is about 10108.1121382778. The cubic root of 102173931 is about 467.4982981055.

The spelling of 102173931 in words is "one hundred two million, one hundred seventy-three thousand, nine hundred thirty-one".