251430723253 has 2 divisors, whose sum is σ = 251430723254. Its totient is φ = 251430723252.

The previous prime is 251430723241. The next prime is 251430723263. The reversal of 251430723253 is 352327034152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251420010724 + 10712529 = 501418^2 + 3273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251430723253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251430723263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125715361626 + 125715361627.

It is an arithmetic number, because the mean of its divisors is an integer number (125715361627).

Almost surely, 2^251430723253 is an apocalyptic number.

It is an amenable number.

251430723253 is a deficient number, since it is larger than the sum of its proper divisors (1).

251430723253 is an equidigital number, since it uses as much as digits as its factorization.

251430723253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 37.

The spelling of 251430723253 in words is "two hundred fifty-one billion, four hundred thirty million, seven hundred twenty-three thousand, two hundred fifty-three".