251144142151 has 4 divisors (see below), whose sum is σ = 287021876752. Its totient is φ = 215266407552.

The previous prime is 251144142043. The next prime is 251144142187. The reversal of 251144142151 is 151241441152.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 251144142151 - 2⁹ = 251144141639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251144142251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17938867290 + ... + 17938867303.

It is an arithmetic number, because the mean of its divisors is an integer number (71755469188).

Almost surely, 2^251144142151 is an apocalyptic number.

251144142151 is a deficient number, since it is larger than the sum of its proper divisors (35877734601).

251144142151 is an equidigital number, since it uses as much as digits as its factorization.

251144142151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35877734600.

The product of its digits is 6400, while the sum is 31.

The spelling of 251144142151 in words is "two hundred fifty-one billion, one hundred forty-four million, one hundred forty-two thousand, one hundred fifty-one".