253515555 has 32 divisors (see below), whose sum is σ = 455181120. Its totient is φ = 133862400.

The previous prime is 253515539. The next prime is 253515569. The reversal of 253515555 is 555515352.

253515555 is a `hidden beast` number, since 2 + 53 + 51 + 5 + 555 = 666.

It is not a de Polignac number, because 253515555 - 2⁴ = 253515539 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4339 + ... + 22931.

It is an arithmetic number, because the mean of its divisors is an integer number (14224410).

Almost surely, 2^253515555 is an apocalyptic number.

253515555 is a deficient number, since it is larger than the sum of its proper divisors (201665565).

253515555 is a wasteful number, since it uses less digits than its factorization.

253515555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18708 (or 18702 counting only the distinct ones).

The product of its digits is 93750, while the sum is 36.

The square root of 253515555 is about 15922.1718053788. The cubic root of 253515555 is about 632.8996718870.

The spelling of 253515555 in words is "two hundred fifty-three million, five hundred fifteen thousand, five hundred fifty-five".