251051452420 has 48 divisors (see below), whose sum is σ = 550268103168. Its totient is φ = 96030380160.

The previous prime is 251051452369. The next prime is 251051452429. The reversal of 251051452420 is 24254150152.

It is not an unprimeable number, because it can be changed into a prime (251051452429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1824682 + ... + 1957438.

It is an arithmetic number, because the mean of its divisors is an integer number (11463918816).

Almost surely, 2^251051452420 is an apocalyptic number.

251051452420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251051452420 is an abundant number, since it is smaller than the sum of its proper divisors (299216650748).

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

251051452420 is a wasteful number, since it uses less digits than its factorization.

251051452420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136900 (or 136898 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 251051452420 in words is "two hundred fifty-one billion, fifty-one million, four hundred fifty-two thousand, four hundred twenty".