320561453 has 4 divisors (see below), whose sum is σ = 320608668. Its totient is φ = 320514240.

The previous prime is 320561413. The next prime is 320561459. The reversal of 320561453 is 354165023.

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 207734569 + 112826884 = 14413^2 + 10622^2 .

It is a cyclic number.

It is not a de Polignac number, because 320561453 - 2¹² = 320557357 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 (320561459) 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, 11276 + ... + 27717.

It is an arithmetic number, because the mean of its divisors is an integer number (80152167).

Almost surely, 2^320561453 is an apocalyptic number.

It is an amenable number.

320561453 is a deficient number, since it is larger than the sum of its proper divisors (47215).

320561453 is an equidigital number, since it uses as much as digits as its factorization.

320561453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47214.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 320561453 is about 17904.2300309173. The cubic root of 320561453 is about 684.3901745779.

The spelling of 320561453 in words is "three hundred twenty million, five hundred sixty-one thousand, four hundred fifty-three".