253355421 has 8 divisors (see below), whose sum is σ = 368517024. Its totient is φ = 153548720.

The previous prime is 253355413. The next prime is 253355447. The reversal of 253355421 is 124553352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253355421 - 2³ = 253355413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253355411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3838686 + ... + 3838751.

It is an arithmetic number, because the mean of its divisors is an integer number (46064628).

Almost surely, 2^253355421 is an apocalyptic number.

It is an amenable number.

253355421 is a deficient number, since it is larger than the sum of its proper divisors (115161603).

253355421 is a wasteful number, since it uses less digits than its factorization.

253355421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7677451.

The product of its digits is 18000, while the sum is 30.

The square root of 253355421 is about 15917.1423628741. The cubic root of 253355421 is about 632.7663860450.

The spelling of 253355421 in words is "two hundred fifty-three million, three hundred fifty-five thousand, four hundred twenty-one".