253638915 has 32 divisors (see below), whose sum is σ = 422597952. Its totient is φ = 129792000.

The previous prime is 253638911. The next prime is 253638941. The reversal of 253638915 is 519836352.

253638915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 253638915 - 2² = 253638911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253638911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34135 + ... + 40895.

It is an arithmetic number, because the mean of its divisors is an integer number (13206186).

Almost surely, 2^253638915 is an apocalyptic number.

253638915 is a deficient number, since it is larger than the sum of its proper divisors (168959037).

253638915 is a wasteful number, since it uses less digits than its factorization.

253638915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6871.

The product of its digits is 194400, while the sum is 42.

The square root of 253638915 is about 15926.0451776328. The cubic root of 253638915 is about 633.0023110108.

The spelling of 253638915 in words is "two hundred fifty-three million, six hundred thirty-eight thousand, nine hundred fifteen".