561999530 has 8 divisors (see below), whose sum is σ = 1011599172. Its totient is φ = 224799808.

The previous prime is 561999521. The next prime is 561999533. The reversal of 561999530 is 35999165.

It can be written as a sum of positive squares in 2 ways, for example, as 548168569 + 13830961 = 23413^2 + 3719^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (561999533) 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, 28099967 + ... + 28099986.

Almost surely, 2^561999530 is an apocalyptic number.

561999530 is a deficient number, since it is larger than the sum of its proper divisors (449599642).

561999530 is a wasteful number, since it uses less digits than its factorization.

561999530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56199960.

The product of its (nonzero) digits is 328050, while the sum is 47.

The square root of 561999530 is about 23706.5292693806. The cubic root of 561999530 is about 825.2369224656.

The spelling of 561999530 in words is "five hundred sixty-one million, nine hundred ninety-nine thousand, five hundred thirty".