561522490 has 16 divisors (see below), whose sum is σ = 1011463200. Its totient is φ = 224448400.

The previous prime is 561522469. The next prime is 561522491. The reversal of 561522490 is 94225165.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (561522491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4840 + ... + 33859.

It is an arithmetic number, because the mean of its divisors is an integer number (63216450).

Almost surely, 2^561522490 is an apocalyptic number.

561522490 is a deficient number, since it is larger than the sum of its proper divisors (449940710).

561522490 is a wasteful number, since it uses less digits than its factorization.

561522490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40157.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 561522490 is about 23696.4657702367. The cubic root of 561522490 is about 825.0033620922.

The spelling of 561522490 in words is "five hundred sixty-one million, five hundred twenty-two thousand, four hundred ninety".