213009900 has 72 divisors (see below), whose sum is σ = 643125504. Its totient is φ = 54331200.

The previous prime is 213009889. The next prime is 213009911. The reversal of 213009900 is 9900312.

It is a happy number.

213009900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (213009889) and next prime (213009911).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8536 + ... + 22335.

Almost surely, 2^213009900 is an apocalyptic number.

213009900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213009900 is an abundant number, since it is smaller than the sum of its proper divisors (430115604).

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

213009900 is a wasteful number, since it uses less digits than its factorization.

213009900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30911 (or 30904 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 213009900 is about 14594.8586837968. The cubic root of 213009900 is about 597.2185143772.

The spelling of 213009900 in words is "two hundred thirteen million, nine thousand, nine hundred".