212351988 has 24 divisors (see below), whose sum is σ = 496772640. Its totient is φ = 70600480.

The previous prime is 212351987. The next prime is 212351989. The reversal of 212351988 is 889153212.

It is an interprime number because it is at equal distance from previous prime (212351987) and next prime (212351989).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212351987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18078 + ... + 27413.

It is an arithmetic number, because the mean of its divisors is an integer number (20698860).

Almost surely, 2^212351988 is an apocalyptic number.

It is an amenable number.

212351988 is an abundant number, since it is smaller than the sum of its proper divisors (284420652).

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

212351988 is a wasteful number, since it uses less digits than its factorization.

212351988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45887 (or 45885 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 212351988 is about 14572.3020830616. The cubic root of 212351988 is about 596.6030148940.

The spelling of 212351988 in words is "two hundred twelve million, three hundred fifty-one thousand, nine hundred eighty-eight".