215053312 has 66 divisors (see below), whose sum is σ = 450532418. Its totient is φ = 102592512.

The previous prime is 215053303. The next prime is 215053327. The reversal of 215053312 is 213350512.

It can be written as a sum of positive squares in only one way, i.e., 195552256 + 19501056 = 13984^2 + 4416^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 541498 + ... + 541894.

Almost surely, 2^215053312 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 215053312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225266209).

215053312 is an abundant number, since it is smaller than the sum of its proper divisors (235479106).

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

215053312 is an equidigital number, since it uses as much as digits as its factorization.

215053312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 215053312 is about 14664.6961100461. The cubic root of 215053312 is about 599.1221533054.

The spelling of 215053312 in words is "two hundred fifteen million, fifty-three thousand, three hundred twelve".