251253051 has 32 divisors (see below), whose sum is σ = 395501568. Its totient is φ = 138879360.

The previous prime is 251253049. The next prime is 251253061. The reversal of 251253051 is 150352152.

It is a happy number.

It is not a de Polignac number, because 251253051 - 2¹ = 251253049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251253001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147561 + ... + 149253.

It is an arithmetic number, because the mean of its divisors is an integer number (12359424).

Almost surely, 2^251253051 is an apocalyptic number.

251253051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

251253051 is a deficient number, since it is larger than the sum of its proper divisors (144248517).

251253051 is a wasteful number, since it uses less digits than its factorization.

251253051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 251253051 is about 15850.9637246446. The cubic root of 251253051 is about 631.0112682722.

The spelling of 251253051 in words is "two hundred fifty-one million, two hundred fifty-three thousand, fifty-one".