212573816 has 32 divisors (see below), whose sum is σ = 490556640. Its totient is φ = 84094848.

The previous prime is 212573813. The next prime is 212573833. The reversal of 212573816 is 618375212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212573813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145271 + ... + 146726.

It is an arithmetic number, because the mean of its divisors is an integer number (15329895).

Almost surely, 2^212573816 is an apocalyptic number.

212573816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

212573816 is an abundant number, since it is smaller than the sum of its proper divisors (277982824).

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

212573816 is a wasteful number, since it uses less digits than its factorization.

212573816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292023 (or 292019 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 212573816 is about 14579.9113851902. The cubic root of 212573816 is about 596.8106845569.

The spelling of 212573816 in words is "two hundred twelve million, five hundred seventy-three thousand, eight hundred sixteen".