216156616 has 32 divisors (see below), whose sum is σ = 459446400. Its totient is φ = 94512960.

The previous prime is 216156607. The next prime is 216156623. The reversal of 216156616 is 616651612.

It is a happy number.

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, 52720 + ... + 56671.

It is an arithmetic number, because the mean of its divisors is an integer number (14357700).

Almost surely, 2^216156616 is an apocalyptic number.

216156616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

216156616 is an abundant number, since it is smaller than the sum of its proper divisors (243289784).

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

216156616 is a wasteful number, since it uses less digits than its factorization.

216156616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109429 (or 109425 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 216156616 is about 14702.2656757386. The cubic root of 216156616 is about 600.1449797801.

The spelling of 216156616 in words is "two hundred sixteen million, one hundred fifty-six thousand, six hundred sixteen".