251252287899887 has 2 divisors, whose sum is σ = 251252287899888. Its totient is φ = 251252287899886.

The previous prime is 251252287899881. The next prime is 251252287899913. The reversal of 251252287899887 is 788998782252152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251252287899887 - 2⁴⁴ = 233660101855471 is a prime.

It is a super-2 number, since 2×251252287899887² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251252287899881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125626143949943 + 125626143949944.

It is an arithmetic number, because the mean of its divisors is an integer number (125626143949944).

Almost surely, 2^{251252287899887} is an apocalyptic number.

251252287899887 is a deficient number, since it is larger than the sum of its proper divisors (1).

251252287899887 is an equidigital number, since it uses as much as digits as its factorization.

251252287899887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6502809600, while the sum is 83.

The spelling of 251252287899887 in words is "two hundred fifty-one trillion, two hundred fifty-two billion, two hundred eighty-seven million, eight hundred ninety-nine thousand, eight hundred eighty-seven".