215210555220 has 48 divisors (see below), whose sum is σ = 602628788160. Its totient is φ = 57385744896.

The previous prime is 215210555179. The next prime is 215210555233. The reversal of 215210555220 is 22555012512.

215210555220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 883239 + ... + 1100241.

It is an arithmetic number, because the mean of its divisors is an integer number (12554766420).

Almost surely, 2^215210555220 is an apocalyptic number.

215210555220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215210555220 is an abundant number, since it is smaller than the sum of its proper divisors (387418232940).

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

215210555220 is a wasteful number, since it uses less digits than its factorization.

215210555220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233544 (or 233542 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 215210555220 its reverse (22555012512), we get a palindrome (237765567732).

The spelling of 215210555220 in words is "two hundred fifteen billion, two hundred ten million, five hundred fifty-five thousand, two hundred twenty".