215522052 has 24 divisors (see below), whose sum is σ = 524750016. Its totient is φ = 68717088.

The previous prime is 215521987. The next prime is 215522057. The reversal of 215522052 is 250225512.

It is not an unprimeable number, because it can be changed into a prime (215522057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390163 + ... + 390714.

It is an arithmetic number, because the mean of its divisors is an integer number (21864584).

Almost surely, 2^215522052 is an apocalyptic number.

It is an amenable number.

215522052 is an abundant number, since it is smaller than the sum of its proper divisors (309227964).

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

215522052 is a wasteful number, since it uses less digits than its factorization.

215522052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780907 (or 780905 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 215522052 is about 14680.6693307901. The cubic root of 215522052 is about 599.5571287444.

Adding to 215522052 its reverse (250225512), we get a palindrome (465747564).

The spelling of 215522052 in words is "two hundred fifteen million, five hundred twenty-two thousand, fifty-two".