561622000 has 40 divisors (see below), whose sum is σ = 1358006832. Its totient is φ = 224648000.

The previous prime is 561621989. The next prime is 561622051. The reversal of 561622000 is 226165.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138406 + ... + 142405.

Almost surely, 2^561622000 is an apocalyptic number.

561622000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561622000 is an abundant number, since it is smaller than the sum of its proper divisors (796384832).

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

561622000 is a wasteful number, since it uses less digits than its factorization.

561622000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280834 (or 280818 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 561622000 is about 23698.5653574220. The cubic root of 561622000 is about 825.0520934354.

Adding to 561622000 its reverse (226165), we get a palindrome (561848165).

The spelling of 561622000 in words is "five hundred sixty-one million, six hundred twenty-two thousand".