253980855 has 24 divisors (see below), whose sum is σ = 450974160. Its totient is φ = 132151680.

The previous prime is 253980851. The next prime is 253980863. The reversal of 253980855 is 558089352.

It is not a de Polignac number, because 253980855 - 2² = 253980851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 253980855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253980851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66985 + ... + 70674.

It is an arithmetic number, because the mean of its divisors is an integer number (18790590).

Almost surely, 2^253980855 is an apocalyptic number.

253980855 is a deficient number, since it is larger than the sum of its proper divisors (196993305).

253980855 is a wasteful number, since it uses less digits than its factorization.

253980855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137711 (or 137708 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The square root of 253980855 is about 15936.7768071213. The cubic root of 253980855 is about 633.2866412176.

The spelling of 253980855 in words is "two hundred fifty-three million, nine hundred eighty thousand, eight hundred fifty-five".