215153312 has 48 divisors (see below), whose sum is σ = 464631552. Its totient is φ = 97259520.

The previous prime is 215153311. The next prime is 215153327. The reversal of 215153312 is 213351512.

It is a happy number.

215153312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215153311) 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, 66353 + ... + 69519.

It is an arithmetic number, because the mean of its divisors is an integer number (9679824).

Almost surely, 2^215153312 is an apocalyptic number.

215153312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215153312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232315776).

215153312 is an abundant number, since it is smaller than the sum of its proper divisors (249478240).

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

215153312 is a wasteful number, since it uses less digits than its factorization.

215153312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381 (or 3373 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 215153312 is about 14668.1052627802. The cubic root of 215153312 is about 599.2150030438.

The spelling of 215153312 in words is "two hundred fifteen million, one hundred fifty-three thousand, three hundred twelve".