215285564 has 12 divisors (see below), whose sum is σ = 405730584. Its totient is φ = 99362544.

The previous prime is 215285537. The next prime is 215285579. The reversal of 215285564 is 465582512.

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, 2070002 + ... + 2070105.

It is an arithmetic number, because the mean of its divisors is an integer number (33810882).

Almost surely, 2^215285564 is an apocalyptic number.

It is an amenable number.

215285564 is a deficient number, since it is larger than the sum of its proper divisors (190445020).

215285564 is a wasteful number, since it uses less digits than its factorization.

215285564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140124 (or 4140122 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 215285564 is about 14672.6127189400. The cubic root of 215285564 is about 599.3377545056.

The spelling of 215285564 in words is "two hundred fifteen million, two hundred eighty-five thousand, five hundred sixty-four".