212433389 has 4 divisors (see below), whose sum is σ = 242781024. Its totient is φ = 182085756.

The previous prime is 212433383. The next prime is 212433407. The reversal of 212433389 is 983334212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212433389 - 2²⁴ = 195656173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212433383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15173807 + ... + 15173820.

It is an arithmetic number, because the mean of its divisors is an integer number (60695256).

Almost surely, 2^212433389 is an apocalyptic number.

It is an amenable number.

212433389 is a deficient number, since it is larger than the sum of its proper divisors (30347635).

212433389 is an equidigital number, since it uses as much as digits as its factorization.

212433389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30347634.

The product of its digits is 31104, while the sum is 35.

The square root of 212433389 is about 14575.0948195887. The cubic root of 212433389 is about 596.6792372052.

The spelling of 212433389 in words is "two hundred twelve million, four hundred thirty-three thousand, three hundred eighty-nine".