215235072 has 120 divisors (see below), whose sum is σ = 669152484. Its totient is φ = 66207744.

The previous prime is 215235049. The next prime is 215235089. The reversal of 215235072 is 270532512.

215235072 is a `hidden beast` number, since 2 + 152 + 3 + 507 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 197796096 + 17438976 = 14064^2 + 4176^2 .

It is a super-2 number, since 2×215235072² = 92652272437690368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58108 + ... + 61700.

Almost surely, 2^215235072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215235072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334576242).

215235072 is an abundant number, since it is smaller than the sum of its proper divisors (453917412).

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

215235072 is a wasteful number, since it uses less digits than its factorization.

215235072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630 (or 3611 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 215235072 is about 14670.8919974213. The cubic root of 215235072 is about 599.2908956151.

Adding to 215235072 its reverse (270532512), we get a palindrome (485767584).

The spelling of 215235072 in words is "two hundred fifteen million, two hundred thirty-five thousand, seventy-two".