2155531684 has 12 divisors (see below), whose sum is σ = 3970716400. Its totient is φ = 1021041288.

The previous prime is 2155531621. The next prime is 2155531699. The reversal of 2155531684 is 4861355512.

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, 14181054 + ... + 14181205.

Almost surely, 2^2155531684 is an apocalyptic number.

It is an amenable number.

2155531684 is a deficient number, since it is larger than the sum of its proper divisors (1815184716).

2155531684 is a wasteful number, since it uses less digits than its factorization.

2155531684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28362282 (or 28362280 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

The square root of 2155531684 is about 46427.7038415643. The cubic root of 2155531684 is about 1291.7688380218.

The spelling of 2155531684 in words is "two billion, one hundred fifty-five million, five hundred thirty-one thousand, six hundred eighty-four".