253112421 has 4 divisors (see below), whose sum is σ = 337483232. Its totient is φ = 168741612.

The previous prime is 253112413. The next prime is 253112423. The reversal of 253112421 is 124211352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 253112421 - 2³ = 253112413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253112423) 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 3 ways as a sum of consecutive naturals, for example, 42185401 + ... + 42185406.

It is an arithmetic number, because the mean of its divisors is an integer number (84370808).

Almost surely, 2^253112421 is an apocalyptic number.

It is an amenable number.

253112421 is a deficient number, since it is larger than the sum of its proper divisors (84370811).

253112421 is an equidigital number, since it uses as much as digits as its factorization.

253112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84370810.

The product of its digits is 480, while the sum is 21.

The square root of 253112421 is about 15909.5072519547. The cubic root of 253112421 is about 632.5640202452.

Adding to 253112421 its reverse (124211352), we get a palindrome (377323773).

The spelling of 253112421 in words is "two hundred fifty-three million, one hundred twelve thousand, four hundred twenty-one".