251310230231 has 4 divisors (see below), whose sum is σ = 251321241264. Its totient is φ = 251299219200.

The previous prime is 251310230209. The next prime is 251310230243. The reversal of 251310230231 is 132032013152.

251310230231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251310230231 is a prime.

It is a super-2 number, since 2×251310230231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251310230197 and 251310230206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251310200231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5471210 + ... + 5516951.

It is an arithmetic number, because the mean of its divisors is an integer number (62830310316).

Almost surely, 2^251310230231 is an apocalyptic number.

251310230231 is a deficient number, since it is larger than the sum of its proper divisors (11011033).

251310230231 is a wasteful number, since it uses less digits than its factorization.

251310230231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11011032.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 251310230231 its reverse (132032013152), we get a palindrome (383342243383).

The spelling of 251310230231 in words is "two hundred fifty-one billion, three hundred ten million, two hundred thirty thousand, two hundred thirty-one".