216464264 has 48 divisors (see below), whose sum is σ = 453656700. Its totient is φ = 96482304.

The previous prime is 216464263. The next prime is 216464273. The reversal of 216464264 is 462464612.

It can be written as a sum of positive squares in 2 ways, for example, as 214036900 + 2427364 = 14630^2 + 1558^2 .

It is not an unprimeable number, because it can be changed into a prime (216464263) 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, 46892 + ... + 51300.

Almost surely, 2^216464264 is an apocalyptic number.

It is an amenable number.

216464264 is an abundant number, since it is smaller than the sum of its proper divisors (237192436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216464264 is a wasteful number, since it uses less digits than its factorization.

216464264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470 (or 4447 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The square root of 216464264 is about 14712.7245607331. The cubic root of 216464264 is about 600.4295664551.

The spelling of 216464264 in words is "two hundred sixteen million, four hundred sixty-four thousand, two hundred sixty-four".