215540332 has 48 divisors (see below), whose sum is σ = 455392000. Its totient is φ = 87200064.

The previous prime is 215540327. The next prime is 215540341. The reversal of 215540332 is 233045512.

215540332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 215540297 and 215540306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201094 + ... + 202162.

Almost surely, 2^215540332 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 215540332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227696000).

215540332 is an abundant number, since it is smaller than the sum of its proper divisors (239851668).

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

215540332 is a wasteful number, since it uses less digits than its factorization.

215540332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478 (or 1476 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 215540332 is about 14681.2919050062. The cubic root of 215540332 is about 599.5740792055.

Adding to 215540332 its reverse (233045512), we get a palindrome (448585844).

The spelling of 215540332 in words is "two hundred fifteen million, five hundred forty thousand, three hundred thirty-two".