216122648 has 16 divisors (see below), whose sum is σ = 463120080. Its totient is φ = 92623968.

The previous prime is 216122639. The next prime is 216122653. The reversal of 216122648 is 846221612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1929611 + ... + 1929722.

It is an arithmetic number, because the mean of its divisors is an integer number (28945005).

Almost surely, 2^216122648 is an apocalyptic number.

216122648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216122648 is an abundant number, since it is smaller than the sum of its proper divisors (246997432).

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

216122648 is a wasteful number, since it uses less digits than its factorization.

216122648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859346 (or 3859342 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 216122648 is about 14701.1104342495. The cubic root of 216122648 is about 600.1135414755.

The spelling of 216122648 in words is "two hundred sixteen million, one hundred twenty-two thousand, six hundred forty-eight".