2151572115 has 80 divisors (see below), whose sum is σ = 4381929216. Its totient is φ = 893995200.

The previous prime is 2151572113. The next prime is 2151572177. The reversal of 2151572115 is 5112751512.

It is not a de Polignac number, because 2151572115 - 2¹ = 2151572113 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2151572113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 393450 + ... + 398880.

Almost surely, 2^2151572115 is an apocalyptic number.

2151572115 is an abundant number, since it is smaller than the sum of its proper divisors (2230357101).

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

2151572115 is an equidigital number, since it uses as much as digits as its factorization.

2151572115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478 (or 5457 counting only the distinct ones).

The product of its digits is 3500, while the sum is 30.

The square root of 2151572115 is about 46385.0419316400. The cubic root of 2151572115 is about 1290.9773885984.

The spelling of 2151572115 in words is "two billion, one hundred fifty-one million, five hundred seventy-two thousand, one hundred fifteen".