250520257 has 4 divisors (see below), whose sum is σ = 269791060. Its totient is φ = 231249456.

The previous prime is 250520243. The next prime is 250520273. The reversal of 250520257 is 752025052.

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 150700176 + 99820081 = 12276^2 + 9991^2 .

It is a cyclic number.

It is not a de Polignac number, because 250520257 - 2¹¹ = 250518209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (250520287) 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, 9635382 + ... + 9635407.

It is an arithmetic number, because the mean of its divisors is an integer number (67447765).

Almost surely, 2^250520257 is an apocalyptic number.

It is an amenable number.

250520257 is a deficient number, since it is larger than the sum of its proper divisors (19270803).

250520257 is a wasteful number, since it uses less digits than its factorization.

250520257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19270802.

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 250520257 is about 15827.8317213698. The cubic root of 250520257 is about 630.3972106661.

The spelling of 250520257 in words is "two hundred fifty million, five hundred twenty thousand, two hundred fifty-seven".