215055764 has 48 divisors (see below), whose sum is σ = 485412480. Its totient is φ = 80895360.

The previous prime is 215055751. The next prime is 215055779. The reversal of 215055764 is 467550512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3107 + ... + 20970.

It is an arithmetic number, because the mean of its divisors is an integer number (10112760).

Almost surely, 2^215055764 is an apocalyptic number.

It is an amenable number.

215055764 is an abundant number, since it is smaller than the sum of its proper divisors (270356716).

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

215055764 is a wasteful number, since it uses less digits than its factorization.

215055764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24128 (or 24126 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 215055764 is about 14664.7797119493. The cubic root of 215055764 is about 599.1244303252.

The spelling of 215055764 in words is "two hundred fifteen million, fifty-five thousand, seven hundred sixty-four".