253565455 has 64 divisors (see below), whose sum is σ = 395394048. Its totient is φ = 153077760.

The previous prime is 253565441. The next prime is 253565467. The reversal of 253565455 is 554565352.

253565455 = T₄₅₉ + T₄₆₀ + ... + T₁₁₇₃.

It is a happy number.

It is not a de Polignac number, because 253565455 - 2¹¹ = 253563407 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 63 ways as a sum of consecutive naturals, for example, 279112 + ... + 280018.

It is an arithmetic number, because the mean of its divisors is an integer number (6178032).

Almost surely, 2^253565455 is an apocalyptic number.

253565455 is a deficient number, since it is larger than the sum of its proper divisors (141828593).

253565455 is a wasteful number, since it uses less digits than its factorization.

253565455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976.

The product of its digits is 450000, while the sum is 40.

The square root of 253565455 is about 15923.7387255632. The cubic root of 253565455 is about 632.9411941541.

The spelling of 253565455 in words is "two hundred fifty-three million, five hundred sixty-five thousand, four hundred fifty-five".