253633401 has 12 divisors (see below), whose sum is σ = 418696512. Its totient is φ = 144933336.

The previous prime is 253633381. The next prime is 253633403. The reversal of 253633401 is 104336352.

It is a happy number.

253633401 is a `hidden beast` number, since 25 + 3 + 633 + 4 + 0 + 1 = 666.

It is not a de Polignac number, because 253633401 - 2⁷ = 253633273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253633403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2012901 + ... + 2013026.

It is an arithmetic number, because the mean of its divisors is an integer number (34891376).

Almost surely, 2^253633401 is an apocalyptic number.

253633401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

253633401 is a deficient number, since it is larger than the sum of its proper divisors (165063111).

253633401 is a wasteful number, since it uses less digits than its factorization.

253633401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4025940 (or 4025937 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 253633401 is about 15925.8720640347. The cubic root of 253633401 is about 632.9977239124.

Adding to 253633401 its reverse (104336352), we get a palindrome (357969753).

It can be divided in two parts, 2536 and 33401, that added together give a cube (35937 = 33³).

The spelling of 253633401 in words is "two hundred fifty-three million, six hundred thirty-three thousand, four hundred one".