250005557 has 2 divisors, whose sum is σ = 250005558. Its totient is φ = 250005556.

The previous prime is 250005499. The next prime is 250005599. The reversal of 250005557 is 755500052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169885156 + 80120401 = 13034^2 + 8951^2 .

It is a cyclic number.

It is not a de Polignac number, because 250005557 - 2¹⁶ = 249940021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250005157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125002778 + 125002779.

It is an arithmetic number, because the mean of its divisors is an integer number (125002779).

Almost surely, 2^250005557 is an apocalyptic number.

It is an amenable number.

250005557 is a deficient number, since it is larger than the sum of its proper divisors (1).

250005557 is an equidigital number, since it uses as much as digits as its factorization.

250005557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8750, while the sum is 29.

The square root of 250005557 is about 15811.5640276350. The cubic root of 250005557 is about 629.9651925004.

The spelling of 250005557 in words is "two hundred fifty million, five thousand, five hundred fifty-seven".