212440432 has 30 divisors (see below), whose sum is σ = 437249048. Its totient is φ = 99969792.

The previous prime is 212440429. The next prime is 212440433. The reversal of 212440432 is 234044212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212440433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18348 + ... + 27595.

Almost surely, 2^212440432 is an apocalyptic number.

It is an amenable number.

212440432 is an abundant number, since it is smaller than the sum of its proper divisors (224808616).

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

212440432 is a wasteful number, since it uses less digits than its factorization.

212440432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45985 (or 45962 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 212440432 is about 14575.3364283642. The cubic root of 212440432 is about 596.6858312180.

Adding to 212440432 its reverse (234044212), we get a palindrome (446484644).

The spelling of 212440432 in words is "two hundred twelve million, four hundred forty thousand, four hundred thirty-two".