215140220 has 48 divisors (see below), whose sum is σ = 459496128. Its totient is φ = 84602880.

The previous prime is 215140213. The next prime is 215140267. The reversal of 215140220 is 22041512.

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, 372572 + ... + 373148.

It is an arithmetic number, because the mean of its divisors is an integer number (9572836).

Almost surely, 2^215140220 is an apocalyptic number.

215140220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215140220 is an abundant number, since it is smaller than the sum of its proper divisors (244355908).

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

215140220 is a wasteful number, since it uses less digits than its factorization.

215140220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 215140220 is about 14667.6589815826. The cubic root of 215140220 is about 599.2028487930.

Adding to 215140220 its reverse (22041512), we get a palindrome (237181732).

The spelling of 215140220 in words is "two hundred fifteen million, one hundred forty thousand, two hundred twenty".