212505412 has 24 divisors (see below), whose sum is σ = 426021120. Its totient is φ = 90857280.

The previous prime is 212505401. The next prime is 212505431. The reversal of 212505412 is 214505212.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3264 + ... + 20872.

It is an arithmetic number, because the mean of its divisors is an integer number (17750880).

Almost surely, 2^212505412 is an apocalyptic number.

It is an amenable number.

212505412 is an abundant number, since it is smaller than the sum of its proper divisors (213515708).

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

212505412 is a wasteful number, since it uses less digits than its factorization.

212505412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18051 (or 18049 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 212505412 is about 14577.5653659999. The cubic root of 212505412 is about 596.7466619058.

It can be divided in two parts, 21250 and 5412, that added together give a palindrome (26662).

The spelling of 212505412 in words is "two hundred twelve million, five hundred five thousand, four hundred twelve".