215870652 has 18 divisors (see below), whose sum is σ = 545673128. Its totient is φ = 71956872.

The previous prime is 215870597. The next prime is 215870659. The reversal of 215870652 is 256078512.

It is a happy number.

215870652 is a `hidden beast` number, since 21 + 587 + 0 + 6 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5996407 = 215870652 / (2 + 1 + 5 + 8 + 7 + 0 + 6 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215870659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2998168 + ... + 2998239.

Almost surely, 2^215870652 is an apocalyptic number.

It is an amenable number.

215870652 is an abundant number, since it is smaller than the sum of its proper divisors (329802476).

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

215870652 is a wasteful number, since it uses less digits than its factorization.

215870652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996417 (or 5996412 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 215870652 is about 14692.5372893861. The cubic root of 215870652 is about 599.8802094186.

The spelling of 215870652 in words is "two hundred fifteen million, eight hundred seventy thousand, six hundred fifty-two".