251211422132153 has 16 divisors (see below), whose sum is σ = 287142770442240. Its totient is φ = 215291076432336.

The previous prime is 251211422132141. The next prime is 251211422132179. The reversal of 251211422132153 is 351231224112152.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251211422132153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251211422152153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1940706008 + ... + 1940835446.

It is an arithmetic number, because the mean of its divisors is an integer number (17946423152640).

Almost surely, 2^{251211422132153} is an apocalyptic number.

It is an amenable number.

251211422132153 is a deficient number, since it is larger than the sum of its proper divisors (35931348310087).

251211422132153 is a wasteful number, since it uses less digits than its factorization.

251211422132153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169796.

The product of its digits is 28800, while the sum is 35.

The spelling of 251211422132153 in words is "two hundred fifty-one trillion, two hundred eleven billion, four hundred twenty-two million, one hundred thirty-two thousand, one hundred fifty-three".