561215216 has 20 divisors (see below), whose sum is σ = 1113876624. Its totient is φ = 273763200.

The previous prime is 561215191. The next prime is 561215233. The reversal of 561215216 is 612512165.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427100 + ... + 428411.

Almost surely, 2^561215216 is an apocalyptic number.

It is an amenable number.

561215216 is a deficient number, since it is larger than the sum of its proper divisors (552661408).

561215216 is a wasteful number, since it uses less digits than its factorization.

561215216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855560 (or 855554 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 561215216 is about 23689.9813423312. The cubic root of 561215216 is about 824.8528496659.

The spelling of 561215216 in words is "five hundred sixty-one million, two hundred fifteen thousand, two hundred sixteen".