250628557 has 2 divisors, whose sum is σ = 250628558. Its totient is φ = 250628556.

The previous prime is 250628533. The next prime is 250628593. The reversal of 250628557 is 755826052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244171876 + 6456681 = 15626^2 + 2541^2 .

It is a cyclic number.

It is not a de Polignac number, because 250628557 - 2⁷ = 250628429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250628507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125314278 + 125314279.

It is an arithmetic number, because the mean of its divisors is an integer number (125314279).

Almost surely, 2^250628557 is an apocalyptic number.

It is an amenable number.

250628557 is a deficient number, since it is larger than the sum of its proper divisors (1).

250628557 is an equidigital number, since it uses as much as digits as its factorization.

250628557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 250628557 is about 15831.2525404656. The cubic root of 250628557 is about 630.4880378951.

The spelling of 250628557 in words is "two hundred fifty million, six hundred twenty-eight thousand, five hundred fifty-seven".