321115253 has 4 divisors (see below), whose sum is σ = 322309260. Its totient is φ = 319921248.

The previous prime is 321115211. The next prime is 321115303. The reversal of 321115253 is 352511123.

It is a happy number.

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 90288004 + 230827249 = 9502^2 + 15193^2 .

It is a cyclic number.

It is not a de Polignac number, because 321115253 - 2⁶ = 321115189 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 (321115153) 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, 596600 + ... + 597137.

It is an arithmetic number, because the mean of its divisors is an integer number (80577315).

Almost surely, 2^321115253 is an apocalyptic number.

It is an amenable number.

321115253 is a deficient number, since it is larger than the sum of its proper divisors (1194007).

321115253 is a wasteful number, since it uses less digits than its factorization.

321115253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194006.

The product of its digits is 900, while the sum is 23.

The square root of 321115253 is about 17919.6889760955. The cubic root of 321115253 is about 684.7840639272.

Adding to 321115253 its reverse (352511123), we get a palindrome (673626376).

The spelling of 321115253 in words is "three hundred twenty-one million, one hundred fifteen thousand, two hundred fifty-three".