213099220 has 24 divisors (see below), whose sum is σ = 455954184. Its totient is φ = 83630976.

The previous prime is 213099179. The next prime is 213099241. The reversal of 213099220 is 22990312.

213099220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9523396 + 203575824 = 3086^2 + 14268^2 .

It is a super-2 number, since 2×213099220² = 90822555129216800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99459 + ... + 101578.

It is an arithmetic number, because the mean of its divisors is an integer number (18998091).

Almost surely, 2^213099220 is an apocalyptic number.

213099220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213099220 is an abundant number, since it is smaller than the sum of its proper divisors (242854964).

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

213099220 is a wasteful number, since it uses less digits than its factorization.

213099220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201099 (or 201097 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 213099220 is about 14597.9183447504. The cubic root of 213099220 is about 597.3019785782.

The spelling of 213099220 in words is "two hundred thirteen million, ninety-nine thousand, two hundred twenty".