253555155 has 72 divisors (see below), whose sum is σ = 520182000. Its totient is φ = 113887872.

The previous prime is 253555097. The next prime is 253555277. The reversal of 253555155 is 551555352.

253555155 is a `hidden beast` number, since 2 + 53 + 5 + 551 + 55 = 666.

It is not a de Polignac number, because 253555155 - 2¹² = 253551059 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 129121 + ... + 131069.

It is an arithmetic number, because the mean of its divisors is an integer number (7224750).

Almost surely, 2^253555155 is an apocalyptic number.

253555155 is an abundant number, since it is smaller than the sum of its proper divisors (266626845).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253555155 is a wasteful number, since it uses less digits than its factorization.

253555155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033 (or 2023 counting only the distinct ones).

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

The square root of 253555155 is about 15923.4153057690. The cubic root of 253555155 is about 632.9326238718.

The spelling of 253555155 in words is "two hundred fifty-three million, five hundred fifty-five thousand, one hundred fifty-five".