215952066 has 48 divisors (see below), whose sum is σ = 515436480. Its totient is φ = 64798560.

The previous prime is 215952047. The next prime is 215952073. The reversal of 215952066 is 660259512.

215952066 is a `hidden beast` number, since 2 + 1 + 595 + 2 + 0 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 215952066.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15100 + ... + 25688.

It is an arithmetic number, because the mean of its divisors is an integer number (10738260).

Almost surely, 2^215952066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215952066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257718240).

215952066 is an abundant number, since it is smaller than the sum of its proper divisors (299484414).

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

215952066 is a wasteful number, since it uses less digits than its factorization.

215952066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10711 (or 10708 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 215952066 is about 14695.3076184202. The cubic root of 215952066 is about 599.9556133831.

The spelling of 215952066 in words is "two hundred fifteen million, nine hundred fifty-two thousand, sixty-six".