561030881 has 4 divisors (see below), whose sum is σ = 585423552. Its totient is φ = 536638212.

The previous prime is 561030863. The next prime is 561030887. The reversal of 561030881 is 188030165.

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.

It is a cyclic number.

It is not a de Polignac number, because 561030881 - 2¹⁴ = 561014497 is a prime.

It is a super-2 number, since 2×561030881² = 629511298871272322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561030887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12196301 + ... + 12196346.

It is an arithmetic number, because the mean of its divisors is an integer number (146355888).

Almost surely, 2^561030881 is an apocalyptic number.

It is an amenable number.

561030881 is a deficient number, since it is larger than the sum of its proper divisors (24392671).

561030881 is a wasteful number, since it uses less digits than its factorization.

561030881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24392670.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 561030881 is about 23686.0904541041. The cubic root of 561030881 is about 824.7625302447.

The spelling of 561030881 in words is "five hundred sixty-one million, thirty thousand, eight hundred eighty-one".