251083195231 has 4 divisors (see below), whose sum is σ = 273908940264. Its totient is φ = 228257450200.

The previous prime is 251083195213. The next prime is 251083195309. The reversal of 251083195231 is 132591380152.

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

It is a cyclic number.

It is not a de Polignac number, because 251083195231 - 2⁵ = 251083195199 is a prime.

It is a super-2 number, since 2×251083195231² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251083165231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11412872500 + ... + 11412872521.

It is an arithmetic number, because the mean of its divisors is an integer number (68477235066).

Almost surely, 2^251083195231 is an apocalyptic number.

251083195231 is a deficient number, since it is larger than the sum of its proper divisors (22825745033).

251083195231 is a wasteful number, since it uses less digits than its factorization.

251083195231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22825745032.

The product of its (nonzero) digits is 64800, while the sum is 40.

It can be divided in two parts, 2510831 and 95231, that added together give a palindrome (2606062).

The spelling of 251083195231 in words is "two hundred fifty-one billion, eighty-three million, one hundred ninety-five thousand, two hundred thirty-one".