100531312 has 20 divisors (see below), whose sum is σ = 222605296. Its totient is φ = 43084800.

The previous prime is 100531307. The next prime is 100531349. The reversal of 100531312 is 213135001.

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, 448689 + ... + 448912.

Almost surely, 2^100531312 is an apocalyptic number.

It is an amenable number.

100531312 is an abundant number, since it is smaller than the sum of its proper divisors (122073984).

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

100531312 is an equidigital number, since it uses as much as digits as its factorization.

100531312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897616 (or 897610 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 100531312 is about 10026.5304068756. The cubic root of 100531312 is about 464.9794757195.

Adding to 100531312 its reverse (213135001), we get a palindrome (313666313).

The spelling of 100531312 in words is "one hundred million, five hundred thirty-one thousand, three hundred twelve".