253372321 has 4 divisors (see below), whose sum is σ = 255221892. Its totient is φ = 251522752.

The previous prime is 253372309. The next prime is 253372349. The reversal of 253372321 is 123273352.

253372321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180526096 + 72846225 = 13436^2 + 8535^2 .

It is a cyclic number.

It is not a de Polignac number, because 253372321 - 2⁷ = 253372193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253372321.

It is not an unprimeable number, because it can be changed into a prime (253372351) 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, 924580 + ... + 924853.

It is an arithmetic number, because the mean of its divisors is an integer number (63805473).

Almost surely, 2^253372321 is an apocalyptic number.

It is an amenable number.

253372321 is a deficient number, since it is larger than the sum of its proper divisors (1849571).

253372321 is a wasteful number, since it uses less digits than its factorization.

253372321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849570.

The product of its digits is 7560, while the sum is 28.

The square root of 253372321 is about 15917.6732282077. The cubic root of 253372321 is about 632.7804552317.

The spelling of 253372321 in words is "two hundred fifty-three million, three hundred seventy-two thousand, three hundred twenty-one".