251397229160 has 64 divisors (see below), whose sum is σ = 705218209920. Its totient is φ = 78357576960.

The previous prime is 251397229133. The next prime is 251397229163. The reversal of 251397229160 is 61922793152.

It is not an unprimeable number, because it can be changed into a prime (251397229163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40808159 + ... + 40814318.

It is an arithmetic number, because the mean of its divisors is an integer number (11019034530).

Almost surely, 2^251397229160 is an apocalyptic number.

251397229160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251397229160 is an abundant number, since it is smaller than the sum of its proper divisors (453820980760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251397229160 is a wasteful number, since it uses less digits than its factorization.

251397229160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81622506 (or 81622502 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 251397229160 in words is "two hundred fifty-one billion, three hundred ninety-seven million, two hundred twenty-nine thousand, one hundred sixty".