231131100100 has 18 divisors (see below), whose sum is σ = 501554487434. Its totient is φ = 92452440000.

The previous prime is 231131100091. The next prime is 231131100121. The reversal of 231131100100 is 1001131132.

It can be written as a sum of positive squares in 3 ways, for example, as 39747599424 + 191383500676 = 199368^2 + 437474^2 .

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, 1155655401 + ... + 1155655600.

Almost surely, 2^231131100100 is an apocalyptic number.

231131100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231131100100 is an abundant number, since it is smaller than the sum of its proper divisors (270423387334).

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

231131100100 is a wasteful number, since it uses less digits than its factorization.

231131100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311311015 (or 2311311008 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 231131100100 its reverse (1001131132), we get a palindrome (232132231232).

The spelling of 231131100100 in words is "two hundred thirty-one billion, one hundred thirty-one million, one hundred thousand, one hundred".