100238931 has 32 divisors (see below), whose sum is σ = 160581120. Its totient is φ = 61432992.

The previous prime is 100238923. The next prime is 100238933. The reversal of 100238931 is 139832001.

It is not a de Polignac number, because 100238931 - 2³ = 100238923 is a prime.

It is a super-2 number, since 2×100238931² = 20095686576045522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 100238895 and 100238904.

It is not an unprimeable number, because it can be changed into a prime (100238933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121386 + ... + 122208.

It is an arithmetic number, because the mean of its divisors is an integer number (5018160).

Almost surely, 2^100238931 is an apocalyptic number.

100238931 is a deficient number, since it is larger than the sum of its proper divisors (60342189).

100238931 is a wasteful number, since it uses less digits than its factorization.

100238931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 100238931 is about 10011.9394225095. The cubic root of 100238931 is about 464.5282624841.

The spelling of 100238931 in words is "one hundred million, two hundred thirty-eight thousand, nine hundred thirty-one".