253501565 has 16 divisors (see below), whose sum is σ = 312847920. Its totient is φ = 197076480.

The previous prime is 253501537. The next prime is 253501609. The reversal of 253501565 is 565105352.

253501565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 148766809 + 104734756 = 12197^2 + 10234^2 .

It is not a de Polignac number, because 253501565 - 2⁸ = 253501309 is a prime.

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, 52847 + ... + 57443.

It is an arithmetic number, because the mean of its divisors is an integer number (19552995).

Almost surely, 2^253501565 is an apocalyptic number.

It is an amenable number.

253501565 is a deficient number, since it is larger than the sum of its proper divisors (59346355).

253501565 is a wasteful number, since it uses less digits than its factorization.

253501565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 253501565 is about 15921.7324748282. The cubic root of 253501565 is about 632.8880296963. Note that the first 3 decimals are identical.

The spelling of 253501565 in words is "two hundred fifty-three million, five hundred one thousand, five hundred sixty-five".