251530245019 has 2 divisors, whose sum is σ = 251530245020. Its totient is φ = 251530245018.

The previous prime is 251530244863. The next prime is 251530245041. The reversal of 251530245019 is 910542035152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251530245019 - 2³³ = 242940310427 is a prime.

It is a super-2 number, since 2×251530245019² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (251530245419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125765122509 + 125765122510.

It is an arithmetic number, because the mean of its divisors is an integer number (125765122510).

Almost surely, 2^251530245019 is an apocalyptic number.

251530245019 is a deficient number, since it is larger than the sum of its proper divisors (1).

251530245019 is an equidigital number, since it uses as much as digits as its factorization.

251530245019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 251530245019 in words is "two hundred fifty-one billion, five hundred thirty million, two hundred forty-five thousand, nineteen".