100531291 has 12 divisors (see below), whose sum is σ = 119666712. Its totient is φ = 84163968.

The previous prime is 100531283. The next prime is 100531307. The reversal of 100531291 is 192135001.

It is not a de Polignac number, because 100531291 - 2³ = 100531283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100531231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21750 + ... + 25963.

It is an arithmetic number, because the mean of its divisors is an integer number (9972226).

Almost surely, 2^100531291 is an apocalyptic number.

100531291 is a deficient number, since it is larger than the sum of its proper divisors (19135421).

100531291 is an equidigital number, since it uses as much as digits as its factorization.

100531291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47770 (or 47763 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 100531291 is about 10026.5293596538. The cubic root of 100531291 is about 464.9794433430.

Adding to 100531291 its reverse (192135001), we get a palindrome (292666292).

The spelling of 100531291 in words is "one hundred million, five hundred thirty-one thousand, two hundred ninety-one".