213021400 has 48 divisors (see below), whose sum is σ = 516819600. Its totient is φ = 81502080.

The previous prime is 213021379. The next prime is 213021427. The reversal of 213021400 is 4120312.

213021400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18555 + ... + 27754.

It is an arithmetic number, because the mean of its divisors is an integer number (10767075).

Almost surely, 2^213021400 is an apocalyptic number.

213021400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213021400 is an abundant number, since it is smaller than the sum of its proper divisors (303798200).

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

213021400 is a wasteful number, since it uses less digits than its factorization.

213021400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46348 (or 46339 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 213021400 is about 14595.2526528320. The cubic root of 213021400 is about 597.2292617482.

Adding to 213021400 its reverse (4120312), we get a palindrome (217141712).

The spelling of 213021400 in words is "two hundred thirteen million, twenty-one thousand, four hundred".