251087878703 has 2 divisors, whose sum is σ = 251087878704. Its totient is φ = 251087878702.

The previous prime is 251087878687. The next prime is 251087878729. The reversal of 251087878703 is 307878780152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251087878703 - 2⁴ = 251087878687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251087878733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125543939351 + 125543939352.

It is an arithmetic number, because the mean of its divisors is an integer number (125543939352).

Almost surely, 2^251087878703 is an apocalyptic number.

251087878703 is a deficient number, since it is larger than the sum of its proper divisors (1).

251087878703 is an equidigital number, since it uses as much as digits as its factorization.

251087878703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5268480, while the sum is 56.

The spelling of 251087878703 in words is "two hundred fifty-one billion, eighty-seven million, eight hundred seventy-eight thousand, seven hundred three".