2156341521 has 32 divisors (see below), whose sum is σ = 3086608000. Its totient is φ = 1334983680.

The previous prime is 2156341501. The next prime is 2156341547. The reversal of 2156341521 is 1251436512.

It is not a de Polignac number, because 2156341521 - 2¹⁴ = 2156325137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156341501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1212585 + ... + 1214361.

It is an arithmetic number, because the mean of its divisors is an integer number (96456500).

Almost surely, 2^2156341521 is an apocalyptic number.

It is an amenable number.

2156341521 is a deficient number, since it is larger than the sum of its proper divisors (930266479).

2156341521 is a wasteful number, since it uses less digits than its factorization.

2156341521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209.

The product of its digits is 7200, while the sum is 30.

The square root of 2156341521 is about 46436.4245070613. The cubic root of 2156341521 is about 1291.9305910324.

The spelling of 2156341521 in words is "two billion, one hundred fifty-six million, three hundred forty-one thousand, five hundred twenty-one".