215322240220 has 48 divisors (see below), whose sum is σ = 461860439040. Its totient is φ = 84284875584.

The previous prime is 215322240179. The next prime is 215322240247. The reversal of 215322240220 is 22042223512.

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, 11062537 + ... + 11081983.

It is an arithmetic number, because the mean of its divisors is an integer number (9622092480).

Almost surely, 2^215322240220 is an apocalyptic number.

215322240220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215322240220 is an abundant number, since it is smaller than the sum of its proper divisors (246538198820).

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

215322240220 is a wasteful number, since it uses less digits than its factorization.

215322240220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31282 (or 31280 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 215322240220 its reverse (22042223512), we get a palindrome (237364463732).

The spelling of 215322240220 in words is "two hundred fifteen billion, three hundred twenty-two million, two hundred forty thousand, two hundred twenty".