253334021 has 8 divisors (see below), whose sum is σ = 255300864. Its totient is φ = 251375040.

The previous prime is 253334009. The next prime is 253334047. The reversal of 253334021 is 120433352.

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

It is not a de Polignac number, because 253334021 - 2²² = 249139717 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 (253334071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73466 + ... + 76836.

It is an arithmetic number, because the mean of its divisors is an integer number (31912608).

Almost surely, 2^253334021 is an apocalyptic number.

It is an amenable number.

253334021 is a deficient number, since it is larger than the sum of its proper divisors (1966843).

253334021 is a wasteful number, since it uses less digits than its factorization.

253334021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 253334021 is about 15916.4701174601. The cubic root of 253334021 is about 632.7485697274.

Adding to 253334021 its reverse (120433352), we get a palindrome (373767373).

The spelling of 253334021 in words is "two hundred fifty-three million, three hundred thirty-four thousand, twenty-one".