212143400 has 48 divisors (see below), whose sum is σ = 563699040. Its totient is φ = 72734400.

The previous prime is 212143367. The next prime is 212143411. The reversal of 212143400 is 4341212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74366 + ... + 77165.

It is an arithmetic number, because the mean of its divisors is an integer number (11743730).

Almost surely, 2^212143400 is an apocalyptic number.

212143400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212143400 is an abundant number, since it is smaller than the sum of its proper divisors (351555640).

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

212143400 is a wasteful number, since it uses less digits than its factorization.

212143400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151554 (or 151545 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212143400 is about 14565.1433223295. The cubic root of 212143400 is about 596.4076082027.

Adding to 212143400 its reverse (4341212), we get a palindrome (216484612).

The spelling of 212143400 in words is "two hundred twelve million, one hundred forty-three thousand, four hundred".