213099388 has 12 divisors (see below), whose sum is σ = 373137352. Its totient is φ = 106488720.

The previous prime is 213099373. The next prime is 213099389. The reversal of 213099388 is 883990312.

It is a happy number.

It is a super-2 number, since 2×213099388² = 90822698331949088, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213099389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6870 + ... + 21757.

Almost surely, 2^213099388 is an apocalyptic number.

It is an amenable number.

213099388 is a deficient number, since it is larger than the sum of its proper divisors (160037964).

213099388 is a wasteful number, since it uses less digits than its factorization.

213099388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30492 (or 30490 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 213099388 is about 14597.9240989943. The cubic root of 213099388 is about 597.3021355422.

The spelling of 213099388 in words is "two hundred thirteen million, ninety-nine thousand, three hundred eighty-eight".