251070020 has 24 divisors (see below), whose sum is σ = 533602944. Its totient is φ = 99217376.

The previous prime is 251070007. The next prime is 251070037. The reversal of 251070020 is 20070152.

251070020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73964 + ... + 77283.

It is an arithmetic number, because the mean of its divisors is an integer number (22233456).

Almost surely, 2^251070020 is an apocalyptic number.

251070020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251070020 is an abundant number, since it is smaller than the sum of its proper divisors (282532924).

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

251070020 is a wasteful number, since it uses less digits than its factorization.

251070020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151339 (or 151337 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 251070020 is about 15845.1891752670. The cubic root of 251070020 is about 630.8580062134.

The spelling of 251070020 in words is "two hundred fifty-one million, seventy thousand, twenty".