253158221 has 4 divisors (see below), whose sum is σ = 253191744. Its totient is φ = 253124700.

The previous prime is 253158163. The next prime is 253158229. The reversal of 253158221 is 122851352.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 253158221 - 2²² = 248963917 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 (253158229) 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, 476 + ... + 22506.

It is an arithmetic number, because the mean of its divisors is an integer number (63297936).

Almost surely, 2^253158221 is an apocalyptic number.

It is an amenable number.

253158221 is a deficient number, since it is larger than the sum of its proper divisors (33523).

253158221 is a wasteful number, since it uses less digits than its factorization.

253158221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33522.

The product of its digits is 4800, while the sum is 29.

The square root of 253158221 is about 15910.9465777495. The cubic root of 253158221 is about 632.6021715204.

The spelling of 253158221 in words is "two hundred fifty-three million, one hundred fifty-eight thousand, two hundred twenty-one".