561232320 has 112 divisors (see below), whose sum is σ = 1943941248. Its totient is φ = 136053760.

The previous prime is 561232319. The next prime is 561232327. The reversal of 561232320 is 23232165.

It is a super-3 number, since 3×561232320³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561232327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16014 + ... + 37133.

Almost surely, 2^561232320 is an apocalyptic number.

It is an amenable number.

561232320 is an abundant number, since it is smaller than the sum of its proper divisors (1382708928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561232320 is a wasteful number, since it uses less digits than its factorization.

561232320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53178 (or 53168 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 561232320 is about 23690.3423360660. The cubic root of 561232320 is about 824.8612291843.

Adding to 561232320 its reverse (23232165), we get a palindrome (584464485).

The spelling of 561232320 in words is "five hundred sixty-one million, two hundred thirty-two thousand, three hundred twenty".