212857144 has 16 divisors (see below), whose sum is σ = 399477600. Its totient is φ = 106329792.

The previous prime is 212857109. The next prime is 212857147. The reversal of 212857144 is 441758212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212857147) 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, 2752 + ... + 20815.

It is an arithmetic number, because the mean of its divisors is an integer number (24967350).

Almost surely, 2^212857144 is an apocalyptic number.

It is an amenable number.

212857144 is a deficient number, since it is larger than the sum of its proper divisors (186620456).

212857144 is a wasteful number, since it uses less digits than its factorization.

212857144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24702 (or 24698 counting only the distinct ones).

The product of its digits is 17920, while the sum is 34.

The square root of 212857144 is about 14589.6245325231. The cubic root of 212857144 is about 597.0757189363.

The spelling of 212857144 in words is "two hundred twelve million, eight hundred fifty-seven thousand, one hundred forty-four".