215156260 has 96 divisors (see below), whose sum is σ = 520660224. Its totient is φ = 73920000.

The previous prime is 215156189. The next prime is 215156269. The reversal of 215156260 is 62651512.

It is not an unprimeable number, because it can be changed into a prime (215156269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 510850 + ... + 511270.

It is an arithmetic number, because the mean of its divisors is an integer number (5423544).

Almost surely, 2^215156260 is an apocalyptic number.

215156260 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 215156260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260330112).

215156260 is an abundant number, since it is smaller than the sum of its proper divisors (305503964).

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

215156260 is a wasteful number, since it uses less digits than its factorization.

215156260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 215156260 is about 14668.2057525793. The cubic root of 215156260 is about 599.2177398175.

The spelling of 215156260 in words is "two hundred fifteen million, one hundred fifty-six thousand, two hundred sixty".