231172100 has 18 divisors (see below), whose sum is σ = 501643674. Its totient is φ = 92468800.

The previous prime is 231172087. The next prime is 231172111. The reversal of 231172100 is 1271132.

It can be written as a sum of positive squares in 3 ways, for example, as 678976 + 230493124 = 824^2 + 15182^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1155761 + ... + 1155960.

It is an arithmetic number, because the mean of its divisors is an integer number (27869093).

Almost surely, 2^231172100 is an apocalyptic number.

231172100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231172100 is an abundant number, since it is smaller than the sum of its proper divisors (270471574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231172100 is a wasteful number, since it uses less digits than its factorization.

231172100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311735 (or 2311728 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 231172100 is about 15204.3447737809. The cubic root of 231172100 is about 613.7315827465.

The spelling of 231172100 in words is "two hundred thirty-one million, one hundred seventy-two thousand, one hundred".