23220530 has 16 divisors (see below), whose sum is σ = 41909400. Its totient is φ = 9263232.

The previous prime is 23220529. The next prime is 23220551. The reversal of 23220530 is 3502232.

It can be written as a sum of positive squares in 4 ways, for example, as 18653761 + 4566769 = 4319^2 + 2137^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23220499 and 23220508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046 + ... + 6894.

Almost surely, 2^23220530 is an apocalyptic number.

23220530 is a deficient number, since it is larger than the sum of its proper divisors (18688870).

23220530 is a wasteful number, since it uses less digits than its factorization.

23220530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6253.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 23220530 is about 4818.7685148801. The cubic root of 23220530 is about 285.2927329753.

Adding to 23220530 its reverse (3502232), we get a palindrome (26722762).

The spelling of 23220530 in words is "twenty-three million, two hundred twenty thousand, five hundred thirty".