216563492 has 12 divisors (see below), whose sum is σ = 395463936. Its totient is φ = 103573800.

The previous prime is 216563491. The next prime is 216563507. The reversal of 216563492 is 294365612.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (216563491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176884 + ... + 1177067.

It is an arithmetic number, because the mean of its divisors is an integer number (32955328).

Almost surely, 2^216563492 is an apocalyptic number.

It is an amenable number.

216563492 is a deficient number, since it is larger than the sum of its proper divisors (178900444).

216563492 is a wasteful number, since it uses less digits than its factorization.

216563492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353978 (or 2353976 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 216563492 is about 14716.0963573904. The cubic root of 216563492 is about 600.5212987999.

The spelling of 216563492 in words is "two hundred sixteen million, five hundred sixty-three thousand, four hundred ninety-two".