211213400 has 48 divisors (see below), whose sum is σ = 492256440. Its totient is φ = 84281600.

The previous prime is 211213397. The next prime is 211213421. The reversal of 211213400 is 4312112.

211213400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211213400² = 89222200679120000, which contains 22 as substring.

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, 103187 + ... + 105213.

Almost surely, 2^211213400 is an apocalyptic number.

211213400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211213400 is an abundant number, since it is smaller than the sum of its proper divisors (281043040).

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

211213400 is a wasteful number, since it uses less digits than its factorization.

211213400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564 (or 2555 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 211213400 is about 14533.1827209321. The cubic root of 211213400 is about 595.5348156086.

Adding to 211213400 its reverse (4312112), we get a palindrome (215525512).

The spelling of 211213400 in words is "two hundred eleven million, two hundred thirteen thousand, four hundred".