253613431 has 4 divisors (see below), whose sum is σ = 253724472. Its totient is φ = 253502392.

The previous prime is 253613419. The next prime is 253613467. The reversal of 253613431 is 134316352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253613431 - 2⁷ = 253613303 is a prime.

It is a super-2 number, since 2×253613431² = 128639544767183522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253613431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253613401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52021 + ... + 56686.

It is an arithmetic number, because the mean of its divisors is an integer number (63431118).

Almost surely, 2^253613431 is an apocalyptic number.

253613431 is a deficient number, since it is larger than the sum of its proper divisors (111041).

253613431 is a wasteful number, since it uses less digits than its factorization.

253613431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111040.

The product of its digits is 6480, while the sum is 28.

The square root of 253613431 is about 15925.2450844563. The cubic root of 253613431 is about 632.9811103062.

Adding to 253613431 its reverse (134316352), we get a palindrome (387929783).

The spelling of 253613431 in words is "two hundred fifty-three million, six hundred thirteen thousand, four hundred thirty-one".