216400562 has 24 divisors (see below), whose sum is σ = 378225324. Its totient is φ = 92588832.

The previous prime is 216400529. The next prime is 216400567. The reversal of 216400562 is 265004612.

It can be written as a sum of positive squares in 2 ways, for example, as 178195801 + 38204761 = 13349^2 + 6181^2 .

It is not an unprimeable number, because it can be changed into a prime (216400567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72728 + ... + 75644.

Almost surely, 2^216400562 is an apocalyptic number.

216400562 is a deficient number, since it is larger than the sum of its proper divisors (161824762).

216400562 is a wasteful number, since it uses less digits than its factorization.

216400562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690 (or 3683 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 216400562 is about 14710.5595406837. The cubic root of 216400562 is about 600.3706617101.

The spelling of 216400562 in words is "two hundred sixteen million, four hundred thousand, five hundred sixty-two".