253032421 has 4 divisors (see below), whose sum is σ = 253540000. Its totient is φ = 252524844.

The previous prime is 253032391. The next prime is 253032449. The reversal of 253032421 is 124230352.

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 a cyclic number.

It is not a de Polignac number, because 253032421 - 2⁷ = 253032293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253032392 and 253032401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253032121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253041 + ... + 254038.

It is an arithmetic number, because the mean of its divisors is an integer number (63385000).

Almost surely, 2^253032421 is an apocalyptic number.

It is an amenable number.

253032421 is a deficient number, since it is larger than the sum of its proper divisors (507579).

253032421 is an equidigital number, since it uses as much as digits as its factorization.

253032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507578.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 253032421 is about 15906.9928333422. The cubic root of 253032421 is about 632.4973694215.

Adding to 253032421 its reverse (124230352), we get a palindrome (377262773).

The spelling of 253032421 in words is "two hundred fifty-three million, thirty-two thousand, four hundred twenty-one".