561022000 has 160 divisors (see below), whose sum is σ = 1691748864. Its totient is φ = 174816000.

The previous prime is 561021961. The next prime is 561022027. The reversal of 561022000 is 220165.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152179 + ... + 155821.

Almost surely, 2^561022000 is an apocalyptic number.

561022000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845874432).

561022000 is an abundant number, since it is smaller than the sum of its proper divisors (1130726864).

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

561022000 is a wasteful number, since it uses less digits than its factorization.

561022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3684 (or 3668 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 561022000 is about 23685.9029804650. The cubic root of 561022000 is about 824.7581782831.

Adding to 561022000 its reverse (220165), we get a palindrome (561242165).

The spelling of 561022000 in words is "five hundred sixty-one million, twenty-two thousand".