216464624 has 10 divisors (see below), whose sum is σ = 419400240. Its totient is φ = 108232304.

The previous prime is 216464617. The next prime is 216464627. The reversal of 216464624 is 426464612.

It is a super-2 number, since 2×216464624² = 93713866886922752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216464627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6764504 + ... + 6764535.

It is an arithmetic number, because the mean of its divisors is an integer number (41940024).

Almost surely, 2^216464624 is an apocalyptic number.

It is an amenable number.

216464624 is a deficient number, since it is larger than the sum of its proper divisors (202935616).

216464624 is a wasteful number, since it uses less digits than its factorization.

216464624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13529047 (or 13529041 counting only the distinct ones).

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

The square root of 216464624 is about 14712.7367950358. The cubic root of 216464624 is about 600.4298993115.

The spelling of 216464624 in words is "two hundred sixteen million, four hundred sixty-four thousand, six hundred twenty-four".