251450120 has 16 divisors (see below), whose sum is σ = 565762860. Its totient is φ = 100580032.

The previous prime is 251450051. The next prime is 251450149. The reversal of 251450120 is 21054152.

It can be written as a sum of positive squares in 2 ways, for example, as 250209124 + 1240996 = 15818^2 + 1114^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 251450092 and 251450101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3143087 + ... + 3143166.

Almost surely, 2^251450120 is an apocalyptic number.

251450120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251450120 is an abundant number, since it is smaller than the sum of its proper divisors (314312740).

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

251450120 is a wasteful number, since it uses less digits than its factorization.

251450120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286264 (or 6286260 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 251450120 is about 15857.1788159180. The cubic root of 251450120 is about 631.1762019404.

The spelling of 251450120 in words is "two hundred fifty-one million, four hundred fifty thousand, one hundred twenty".