251036135233 has 16 divisors (see below), whose sum is σ = 270903286080. Its totient is φ = 231248856384.

The previous prime is 251036135227. The next prime is 251036135243. The reversal of 251036135233 is 332531630152.

It is a de Polignac number, because none of the positive numbers 2^k-251036135233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251036135243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22872135 + ... + 22883107.

It is an arithmetic number, because the mean of its divisors is an integer number (16931455380).

Almost surely, 2^251036135233 is an apocalyptic number.

It is an amenable number.

251036135233 is a deficient number, since it is larger than the sum of its proper divisors (19867150847).

251036135233 is a wasteful number, since it uses less digits than its factorization.

251036135233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14448.

The product of its (nonzero) digits is 48600, while the sum is 34.

Adding to 251036135233 its reverse (332531630152), we get a palindrome (583567765385).

The spelling of 251036135233 in words is "two hundred fifty-one billion, thirty-six million, one hundred thirty-five thousand, two hundred thirty-three".