215555152 has 80 divisors (see below), whose sum is σ = 460684800. Its totient is φ = 97320960.

The previous prime is 215555141. The next prime is 215555161. The reversal of 215555152 is 251555512.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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, 838608 + ... + 838864.

It is an arithmetic number, because the mean of its divisors is an integer number (5758560).

Almost surely, 2^215555152 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 215555152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230342400).

215555152 is an abundant number, since it is smaller than the sum of its proper divisors (245129648).

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

215555152 is a wasteful number, since it uses less digits than its factorization.

215555152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 398 counting only the distinct ones).

The product of its digits is 12500, while the sum is 31.

The square root of 215555152 is about 14681.7966203050. The cubic root of 215555152 is about 599.5878206155.

The spelling of 215555152 in words is "two hundred fifteen million, five hundred fifty-five thousand, one hundred fifty-two".