253201321 has 4 divisors (see below), whose sum is σ = 253519812. Its totient is φ = 252882832.

The previous prime is 253201309. The next prime is 253201337. The reversal of 253201321 is 123102352.

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 199911321 + 53290000 = 14139^2 + 7300^2 .

It is a cyclic number.

It is not a de Polignac number, because 253201321 - 2¹¹ = 253199273 is a prime.

It is a super-2 number, since 2×253201321² = 128221817912290082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253201381) 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, 158050 + ... + 159643.

It is an arithmetic number, because the mean of its divisors is an integer number (63379953).

Almost surely, 2^253201321 is an apocalyptic number.

It is an amenable number.

253201321 is a deficient number, since it is larger than the sum of its proper divisors (318491).

253201321 is an equidigital number, since it uses as much as digits as its factorization.

253201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318490.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 253201321 is about 15912.3009335545. The cubic root of 253201321 is about 632.6380695006.

Adding to 253201321 its reverse (123102352), we get a palindrome (376303673).

The spelling of 253201321 in words is "two hundred fifty-three million, two hundred one thousand, three hundred twenty-one".