250660565 has 16 divisors (see below), whose sum is σ = 304392816. Its totient is φ = 198144000.

The previous prime is 250660537. The next prime is 250660573. The reversal of 250660565 is 565066052.

It can be written as a sum of positive squares in 8 ways, for example, as 9572836 + 241087729 = 3094^2 + 15527^2 .

It is not a de Polignac number, because 250660565 - 2⁸ = 250660309 is a prime.

It is a super-2 number, since 2×250660565² = 125661437692238450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155765 + ... + 157365.

It is an arithmetic number, because the mean of its divisors is an integer number (19024551).

Almost surely, 2^250660565 is an apocalyptic number.

It is an amenable number.

250660565 is a deficient number, since it is larger than the sum of its proper divisors (53732251).

250660565 is a wasteful number, since it uses less digits than its factorization.

250660565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 250660565 is about 15832.2634199915. The cubic root of 250660565 is about 630.5148768187.

The spelling of 250660565 in words is "two hundred fifty million, six hundred sixty thousand, five hundred sixty-five".