251310125233 has 2 divisors, whose sum is σ = 251310125234. Its totient is φ = 251310125232.

The previous prime is 251310125219. The next prime is 251310125237. The reversal of 251310125233 is 332521013152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174964014369 + 76346110864 = 418287^2 + 276308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251310125233 is a prime.

It is a super-2 number, since 2×251310125233² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (251310125237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125655062616 + 125655062617.

It is an arithmetic number, because the mean of its divisors is an integer number (125655062617).

Almost surely, 2^251310125233 is an apocalyptic number.

It is an amenable number.

251310125233 is a deficient number, since it is larger than the sum of its proper divisors (1).

251310125233 is an equidigital number, since it uses as much as digits as its factorization.

251310125233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 251310125233 its reverse (332521013152), we get a palindrome (583831138385).

The spelling of 251310125233 in words is "two hundred fifty-one billion, three hundred ten million, one hundred twenty-five thousand, two hundred thirty-three".