2152156131891 has 48 divisors (see below), whose sum is σ = 3381446772288. Its totient is φ = 1313505331200.

The previous prime is 2152156131889. The next prime is 2152156131899. The reversal of 2152156131891 is 1981316512512.

2152156131891 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 1 + 561 + 3 + 1 + 89 + 1 = 666.

It is not a de Polignac number, because 2152156131891 - 2¹ = 2152156131889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2152156131899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20729751 + ... + 20833311.

It is an arithmetic number, because the mean of its divisors is an integer number (70446807756).

Almost surely, 2^{2152156131891} is an apocalyptic number.

2152156131891 is a deficient number, since it is larger than the sum of its proper divisors (1229290640397).

2152156131891 is a wasteful number, since it uses less digits than its factorization.

2152156131891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107292 (or 107289 counting only the distinct ones).

The product of its digits is 129600, while the sum is 45.

The spelling of 2152156131891 in words is "two trillion, one hundred fifty-two billion, one hundred fifty-six million, one hundred thirty-one thousand, eight hundred ninety-one".