561521472 has 56 divisors (see below), whose sum is σ = 1525865376. Its totient is φ = 182112768.

The previous prime is 561521453. The next prime is 561521551. The reversal of 561521472 is 274125165.

It is a congruent number.

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, 32418 + ... + 46625.

It is an arithmetic number, because the mean of its divisors is an integer number (27247596).

Almost surely, 2^561521472 is an apocalyptic number.

It is an amenable number.

561521472 is an abundant number, since it is smaller than the sum of its proper divisors (964343904).

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

561521472 is a wasteful number, since it uses less digits than its factorization.

561521472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79095 (or 79085 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 561521472 is about 23696.4442902305. Note that the first 3 decimals coincide. The cubic root of 561521472 is about 825.0028635346.

The spelling of 561521472 in words is "five hundred sixty-one million, five hundred twenty-one thousand, four hundred seventy-two".