561122000 has 40 divisors (see below), whose sum is σ = 1356797832. Its totient is φ = 224448000.

The previous prime is 561121999. The next prime is 561122021. The reversal of 561122000 is 221165.

It can be written as a sum of positive squares in 4 ways, for example, as 174134416 + 386987584 = 13196^2 + 19672^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 561122000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138281 + ... + 142280.

Almost surely, 2^561122000 is an apocalyptic number.

561122000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561122000 is an abundant number, since it is smaller than the sum of its proper divisors (795675832).

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

561122000 is a wasteful number, since it uses less digits than its factorization.

561122000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280584 (or 280568 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 561122000 is about 23688.0138466694. The cubic root of 561122000 is about 824.8071786895.

Adding to 561122000 its reverse (221165), we get a palindrome (561343165).

The spelling of 561122000 in words is "five hundred sixty-one million, one hundred twenty-two thousand".