212321232 has 60 divisors (see below), whose sum is σ = 613385344. Its totient is φ = 68489280.

The previous prime is 212321203. The next prime is 212321261. The reversal of 212321232 is 232123212.

212321232 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

212321232 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (212321203) and next prime (212321261).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19318 + ... + 28245.

Almost surely, 2^212321232 is an apocalyptic number.

It is an amenable number.

212321232 is an abundant number, since it is smaller than the sum of its proper divisors (401064112).

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

212321232 is a wasteful number, since it uses less digits than its factorization.

212321232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47608 (or 47599 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 212321232 is about 14571.2467551682. The cubic root of 212321232 is about 596.5742105042.

Adding to 212321232 its reverse (232123212), we get a palindrome (444444444).

The spelling of 212321232 in words is "two hundred twelve million, three hundred twenty-one thousand, two hundred thirty-two".