251125291 has 2 divisors, whose sum is σ = 251125292. Its totient is φ = 251125290.

The previous prime is 251125271. The next prime is 251125321. The reversal of 251125291 is 192521152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251125291 - 2⁷ = 251125163 is a prime.

It is not a weakly prime, because it can be changed into another prime (251125271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125562645 + 125562646.

It is an arithmetic number, because the mean of its divisors is an integer number (125562646).

Almost surely, 2^251125291 is an apocalyptic number.

251125291 is a deficient number, since it is larger than the sum of its proper divisors (1).

251125291 is an equidigital number, since it uses as much as digits as its factorization.

251125291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 28.

The square root of 251125291 is about 15846.9331733304. The cubic root of 251125291 is about 630.9042955507.

It can be divided in two parts, 25112 and 5291, that added together give a palindrome (30403).

The spelling of 251125291 in words is "two hundred fifty-one million, one hundred twenty-five thousand, two hundred ninety-one".