222320513 has 4 divisors (see below), whose sum is σ = 222351408. Its totient is φ = 222289620.

The previous prime is 222320479. The next prime is 222320521. The reversal of 222320513 is 315023222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 315023222 = 2 ⋅157511611.

It is a cyclic number.

It is not a de Polignac number, because 222320513 - 2¹² = 222316417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222340513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670 + ... + 21152.

It is an arithmetic number, because the mean of its divisors is an integer number (55587852).

Almost surely, 2^222320513 is an apocalyptic number.

It is an amenable number.

222320513 is a deficient number, since it is larger than the sum of its proper divisors (30895).

222320513 is a wasteful number, since it uses less digits than its factorization.

222320513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30894.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 222320513 is about 14910.4162584416. The cubic root of 222320513 is about 605.7961542123.

Adding to 222320513 its reverse (315023222), we get a palindrome (537343735).

The spelling of 222320513 in words is "two hundred twenty-two million, three hundred twenty thousand, five hundred thirteen".