215102220 has 48 divisors (see below), whose sum is σ = 602972160. Its totient is φ = 57295296.

The previous prime is 215102197. The next prime is 215102243. The reversal of 215102220 is 22201512.

It is an interprime number because it is at equal distance from previous prime (215102197) and next prime (215102243).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 215102220.

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, 75339 + ... + 78141.

It is an arithmetic number, because the mean of its divisors is an integer number (12561920).

Almost surely, 2^215102220 is an apocalyptic number.

215102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215102220 is an abundant number, since it is smaller than the sum of its proper divisors (387869940).

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

215102220 is a wasteful number, since it uses less digits than its factorization.

215102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094 (or 4092 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 215102220 is about 14666.3635574740. The cubic root of 215102220 is about 599.1675678509.

Adding to 215102220 its reverse (22201512), we get a palindrome (237303732).

The spelling of 215102220 in words is "two hundred fifteen million, one hundred two thousand, two hundred twenty".