251023253 has 4 divisors (see below), whose sum is σ = 270332748. Its totient is φ = 231713760.

The previous prime is 251023189. The next prime is 251023261. The reversal of 251023253 is 352320152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34550884 + 216472369 = 5878^2 + 14713^2 .

It is a cyclic number.

It is not a de Polignac number, because 251023253 - 2⁶ = 251023189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251023453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9654728 + ... + 9654753.

It is an arithmetic number, because the mean of its divisors is an integer number (67583187).

Almost surely, 2^251023253 is an apocalyptic number.

It is an amenable number.

251023253 is a deficient number, since it is larger than the sum of its proper divisors (19309495).

251023253 is a wasteful number, since it uses less digits than its factorization.

251023253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19309494.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 251023253 is about 15843.7133589320. The cubic root of 251023253 is about 630.8188336505.

The spelling of 251023253 in words is "two hundred fifty-one million, twenty-three thousand, two hundred fifty-three".