100431232 has 32 divisors (see below), whose sum is σ = 218269800. Its totient is φ = 45649920.

The previous prime is 100431229. The next prime is 100431251. The reversal of 100431232 is 232134001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×100431232² = 20172864722075648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34257 + ... + 37072.

Almost surely, 2^100431232 is an apocalyptic number.

It is an amenable number.

100431232 is an abundant number, since it is smaller than the sum of its proper divisors (117838568).

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

100431232 is an equidigital number, since it uses as much as digits as its factorization.

100431232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71354 (or 71342 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 100431232 is about 10021.5384048558. The cubic root of 100431232 is about 464.8251271369.

Adding to 100431232 its reverse (232134001), we get a palindrome (332565233).

The spelling of 100431232 in words is "one hundred million, four hundred thirty-one thousand, two hundred thirty-two".