216322474 has 8 divisors (see below), whose sum is σ = 324737028. Its totient is φ = 108076800.

The previous prime is 216322471. The next prime is 216322489. The reversal of 216322474 is 474223612.

It is a happy number.

216322474 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 125596849 + 90725625 = 11207^2 + 9525^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (216322471) 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, 38967 + ... + 44170.

Almost surely, 2^216322474 is an apocalyptic number.

216322474 is a deficient number, since it is larger than the sum of its proper divisors (108414554).

216322474 is a wasteful number, since it uses less digits than its factorization.

216322474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84440.

The product of its digits is 16128, while the sum is 31.

The square root of 216322474 is about 14707.9051533521. The cubic root of 216322474 is about 600.2984385698.

The spelling of 216322474 in words is "two hundred sixteen million, three hundred twenty-two thousand, four hundred seventy-four".