216532560 has 160 divisors (see below), whose sum is σ = 708704640. Its totient is φ = 54605824.

The previous prime is 216532559. The next prime is 216532573. The reversal of 216532560 is 65235612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368587 + ... + 369173.

It is an arithmetic number, because the mean of its divisors is an integer number (4429404).

Almost surely, 2^216532560 is an apocalyptic number.

216532560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216532560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354352320).

216532560 is an abundant number, since it is smaller than the sum of its proper divisors (492172080).

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

216532560 is a wasteful number, since it uses less digits than its factorization.

216532560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 216532560 is about 14715.0453618057. The cubic root of 216532560 is about 600.4927064010.

The spelling of 216532560 in words is "two hundred sixteen million, five hundred thirty-two thousand, five hundred sixty".