251211053210145 has 32 divisors (see below), whose sum is σ = 470040083622912. Its totient is φ = 112168656315072.

The previous prime is 251211053210141. The next prime is 251211053210167. The reversal of 251211053210145 is 541012350112152.

It is not a de Polignac number, because 251211053210145 - 2² = 251211053210141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251211053210141) 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, 27819602707 + ... + 27819611736.

It is an arithmetic number, because the mean of its divisors is an integer number (14688752613216).

Almost surely, 2^{251211053210145} is an apocalyptic number.

It is an amenable number.

251211053210145 is a deficient number, since it is larger than the sum of its proper divisors (218829030412767).

251211053210145 is a wasteful number, since it uses less digits than its factorization.

251211053210145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55639214501.

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 251211053210145 in words is "two hundred fifty-one trillion, two hundred eleven billion, fifty-three million, two hundred ten thousand, one hundred forty-five".