212145432 has 32 divisors (see below), whose sum is σ = 540373680. Its totient is φ = 69380480.

The previous prime is 212145413. The next prime is 212145443. The reversal of 212145432 is 234541212.

212145432 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 82119 + ... + 84662.

Almost surely, 2^212145432 is an apocalyptic number.

It is an amenable number.

212145432 is an abundant number, since it is smaller than the sum of its proper divisors (328228248).

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

212145432 is a wasteful number, since it uses less digits than its factorization.

212145432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166843 (or 166839 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 212145432 is about 14565.2130777411. The cubic root of 212145432 is about 596.4095124121.

Adding to 212145432 its reverse (234541212), we get a palindrome (446686644).

The spelling of 212145432 in words is "two hundred twelve million, one hundred forty-five thousand, four hundred thirty-two".