253399563 has 16 divisors (see below), whose sum is σ = 375653760. Its totient is φ = 168821928.

The previous prime is 253399547. The next prime is 253399567. The reversal of 253399563 is 365993352.

253399563 is a `hidden beast` number, since 2 + 53 + 39 + 9 + 563 = 666.

It is not a de Polignac number, because 253399563 - 2⁴ = 253399547 is a prime.

It is a super-2 number, since 2×253399563² = 128422677057181938, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (253399567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71356 + ... + 74822.

It is an arithmetic number, because the mean of its divisors is an integer number (23478360).

Almost surely, 2^253399563 is an apocalyptic number.

253399563 is a deficient number, since it is larger than the sum of its proper divisors (122254197).

253399563 is a wasteful number, since it uses less digits than its factorization.

253399563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6183 (or 6177 counting only the distinct ones).

The product of its digits is 656100, while the sum is 45.

The square root of 253399563 is about 15918.5289207263. The cubic root of 253399563 is about 632.8031327777.

The spelling of 253399563 in words is "two hundred fifty-three million, three hundred ninety-nine thousand, five hundred sixty-three".