102153231 has 20 divisors (see below), whose sum is σ = 155851872. Its totient is φ = 66650688.

The previous prime is 102153217. The next prime is 102153257. The reversal of 102153231 is 132351201.

102153231 is a `hidden beast` number, since 102 + 1 + 532 + 31 = 666.

It is not a de Polignac number, because 102153231 - 2⁵ = 102153199 is a prime.

It is a super-2 number, since 2×102153231² = 20870565207478722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102153211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9610 + ... + 17223.

Almost surely, 2^102153231 is an apocalyptic number.

102153231 is a deficient number, since it is larger than the sum of its proper divisors (53698641).

102153231 is an equidigital number, since it uses as much as digits as its factorization.

102153231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26892 (or 26883 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 102153231 is about 10107.0881563386. The cubic root of 102153231 is about 467.4667249234.

The spelling of 102153231 in words is "one hundred two million, one hundred fifty-three thousand, two hundred thirty-one".