251543345151 has 64 divisors (see below), whose sum is σ = 405266923520. Its totient is φ = 135571605120.

The previous prime is 251543345143. The next prime is 251543345153. The reversal of 251543345151 is 151543345152.

It is not a de Polignac number, because 251543345151 - 2³ = 251543345143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251543345153) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101962020 + ... + 101964486.

It is an arithmetic number, because the mean of its divisors is an integer number (6332295680).

Almost surely, 2^251543345151 is an apocalyptic number.

251543345151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

251543345151 is a deficient number, since it is larger than the sum of its proper divisors (153723578369).

251543345151 is a wasteful number, since it uses less digits than its factorization.

251543345151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524.

The product of its digits is 180000, while the sum is 39.

Subtracting from 251543345151 its reverse (151543345152), we obtain a palindrome (99999999999).

The spelling of 251543345151 in words is "two hundred fifty-one billion, five hundred forty-three million, three hundred forty-five thousand, one hundred fifty-one".