216423364 has 12 divisors (see below), whose sum is σ = 384950188. Its totient is φ = 106437600.

The previous prime is 216423349. The next prime is 216423371. The reversal of 216423364 is 463324612.

It can be written as a sum of positive squares in 2 ways, for example, as 3496900 + 212926464 = 1870^2 + 14592^2 .

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, 443247 + ... + 443734.

Almost surely, 2^216423364 is an apocalyptic number.

It is an amenable number.

216423364 is a deficient number, since it is larger than the sum of its proper divisors (168526824).

216423364 is a wasteful number, since it uses less digits than its factorization.

216423364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887046 (or 887044 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 216423364 is about 14711.3345417742. The cubic root of 216423364 is about 600.3917478707.

Adding to 216423364 its reverse (463324612), we get a palindrome (679747976).

The spelling of 216423364 in words is "two hundred sixteen million, four hundred twenty-three thousand, three hundred sixty-four".