2131531104 has 48 divisors (see below), whose sum is σ = 5700853872. Its totient is φ = 697102848.

The previous prime is 2131531069. The next prime is 2131531123. The reversal of 2131531104 is 4011351312.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204379 + ... + 214554.

It is an arithmetic number, because the mean of its divisors is an integer number (118767789).

Almost surely, 2^2131531104 is an apocalyptic number.

2131531104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2131531104 is an abundant number, since it is smaller than the sum of its proper divisors (3569322768).

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

2131531104 is a wasteful number, since it uses less digits than its factorization.

2131531104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418999 (or 418991 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2131531104 is about 46168.5077081770. The cubic root of 2131531104 is about 1286.9565704095.

Adding to 2131531104 its reverse (4011351312), we get a palindrome (6142882416).

The spelling of 2131531104 in words is "two billion, one hundred thirty-one million, five hundred thirty-one thousand, one hundred four".