212144432 has 20 divisors (see below), whose sum is σ = 415270296. Its totient is φ = 104977920.

The previous prime is 212144423. The next prime is 212144437. The reversal of 212144432 is 234441212.

It is a junction number, because it is equal to n+sod(n) for n = 212144398 and 212144407.

It is not an unprimeable number, because it can be changed into a prime (212144437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66794 + ... + 69897.

Almost surely, 2^212144432 is an apocalyptic number.

It is an amenable number.

212144432 is a deficient number, since it is larger than the sum of its proper divisors (203125864).

212144432 is a wasteful number, since it uses less digits than its factorization.

212144432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136796 (or 136790 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 212144432 is about 14565.1787493323. The cubic root of 212144432 is about 596.4085753027.

Adding to 212144432 its reverse (234441212), we get a palindrome (446585644).

The spelling of 212144432 in words is "two hundred twelve million, one hundred forty-four thousand, four hundred thirty-two".