215706052 has 12 divisors (see below), whose sum is σ = 393898176. Its totient is φ = 103163720.

The previous prime is 215706019. The next prime is 215706053. The reversal of 215706052 is 250607512.

It is a self number, because there is not a number n which added to its sum of digits gives 215706052.

It is not an unprimeable number, because it can be changed into a prime (215706053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172224 + ... + 1172407.

It is an arithmetic number, because the mean of its divisors is an integer number (32824848).

Almost surely, 2^215706052 is an apocalyptic number.

It is an amenable number.

215706052 is a deficient number, since it is larger than the sum of its proper divisors (178192124).

215706052 is a wasteful number, since it uses less digits than its factorization.

215706052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344658 (or 2344656 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 215706052 is about 14686.9347380589. The cubic root of 215706052 is about 599.7277023680.

The spelling of 215706052 in words is "two hundred fifteen million, seven hundred six thousand, fifty-two".