216250220 has 12 divisors (see below), whose sum is σ = 454125504. Its totient is φ = 86500080.

The previous prime is 216250219. The next prime is 216250241. The reversal of 216250220 is 22052612.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10812511 = 216250220 / (2 + 1 + 6 + 2 + 5 + 0 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 216250192 and 216250201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5406236 + ... + 5406275.

It is an arithmetic number, because the mean of its divisors is an integer number (37843792).

Almost surely, 2^216250220 is an apocalyptic number.

216250220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216250220 is an abundant number, since it is smaller than the sum of its proper divisors (237875284).

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

216250220 is a wasteful number, since it uses less digits than its factorization.

216250220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10812520 (or 10812518 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 216250220 is about 14705.4486500753. The cubic root of 216250220 is about 600.2315957793.

The spelling of 216250220 in words is "two hundred sixteen million, two hundred fifty thousand, two hundred twenty".