253005321 has 16 divisors (see below), whose sum is σ = 342598400. Its totient is φ = 166053888.

The previous prime is 253005317. The next prime is 253005439. The reversal of 253005321 is 123500352.

It is not a de Polignac number, because 253005321 - 2² = 253005317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253005521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92745 + ... + 95433.

It is an arithmetic number, because the mean of its divisors is an integer number (21412400).

Almost surely, 2^253005321 is an apocalyptic number.

It is an amenable number.

253005321 is a deficient number, since it is larger than the sum of its proper divisors (89593079).

253005321 is a wasteful number, since it uses less digits than its factorization.

253005321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 253005321 is about 15906.1409839093. The cubic root of 253005321 is about 632.4747882695.

Adding to 253005321 its reverse (123500352), we get a palindrome (376505673).

The spelling of 253005321 in words is "two hundred fifty-three million, five thousand, three hundred twenty-one".