216364402 has 4 divisors (see below), whose sum is σ = 324546606. Its totient is φ = 108182200.

The previous prime is 216364399. The next prime is 216364403. The reversal of 216364402 is 204463612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 111281401 + 105083001 = 10549^2 + 10251^2 .

It is not an unprimeable number, because it can be changed into a prime (216364403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54091099 + ... + 54091102.

Almost surely, 2^216364402 is an apocalyptic number.

216364402 is a deficient number, since it is larger than the sum of its proper divisors (108182204).

216364402 is a wasteful number, since it uses less digits than its factorization.

216364402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108182203.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 216364402 is about 14709.3304402342. The cubic root of 216364402 is about 600.3372196952.

The spelling of 216364402 in words is "two hundred sixteen million, three hundred sixty-four thousand, four hundred two".