251328253 has 12 divisors (see below), whose sum is σ = 285169024. Its totient is φ = 221106600.

The previous prime is 251328251. The next prime is 251328277. The reversal of 251328253 is 352823152.

It is not a de Polignac number, because 251328253 - 2¹ = 251328251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251328251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29751 + ... + 37252.

Almost surely, 2^251328253 is an apocalyptic number.

It is an amenable number.

251328253 is a deficient number, since it is larger than the sum of its proper divisors (33840771).

251328253 is a wasteful number, since it uses less digits than its factorization.

251328253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67056 (or 67045 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 251328253 is about 15853.3357057750. The cubic root of 251328253 is about 631.0742175255.

The spelling of 251328253 in words is "two hundred fifty-one million, three hundred twenty-eight thousand, two hundred fifty-three".