216464516 has 24 divisors (see below), whose sum is σ = 392345856. Its totient is φ = 104431040.

The previous prime is 216464509. The next prime is 216464527. The reversal of 216464516 is 615464612.

It is a super-2 number, since 2×216464516² = 93713773374228512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5240 + ... + 21456.

It is an arithmetic number, because the mean of its divisors is an integer number (16347744).

Almost surely, 2^216464516 is an apocalyptic number.

It is an amenable number.

216464516 is a deficient number, since it is larger than the sum of its proper divisors (175881340).

216464516 is a wasteful number, since it uses less digits than its factorization.

216464516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16339 (or 16337 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 216464516 is about 14712.7331247461. The cubic root of 216464516 is about 600.4297994546.

It can be divided in two parts, 21646 and 4516, that added together give a palindrome (26162).

The spelling of 216464516 in words is "two hundred sixteen million, four hundred sixty-four thousand, five hundred sixteen".