215158120 has 64 divisors (see below), whose sum is σ = 514518480. Its totient is φ = 80695296.

The previous prime is 215158067. The next prime is 215158121. The reversal of 215158120 is 21851512.

It can be written as a sum of positive squares in 8 ways, for example, as 140612164 + 74545956 = 11858^2 + 8634^2 .

It is not an unprimeable number, because it can be changed into a prime (215158121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269562 + ... + 270358.

Almost surely, 2^215158120 is an apocalyptic number.

215158120 is a gapful number since it is divisible by the number (20) 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 215158120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257259240).

215158120 is an abundant number, since it is smaller than the sum of its proper divisors (299360360).

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

215158120 is a wasteful number, since it uses less digits than its factorization.

215158120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 215158120 is about 14668.2691548799. The cubic root of 215158120 is about 599.2194665343.

The spelling of 215158120 in words is "two hundred fifteen million, one hundred fifty-eight thousand, one hundred twenty".