212681964 has 24 divisors (see below), whose sum is σ = 541372608. Its totient is φ = 64449040.

The previous prime is 212681941. The next prime is 212681971. The reversal of 212681964 is 469186212.

212681964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805482 + ... + 805745.

It is an arithmetic number, because the mean of its divisors is an integer number (22557192).

Almost surely, 2^212681964 is an apocalyptic number.

It is an amenable number.

212681964 is an abundant number, since it is smaller than the sum of its proper divisors (328690644).

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

212681964 is a wasteful number, since it uses less digits than its factorization.

212681964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611245 (or 1611243 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 212681964 is about 14583.6197152833. The cubic root of 212681964 is about 596.9118775457.

It can be divided in two parts, 21268 and 1964, that added together give a palindrome (23232).

The spelling of 212681964 in words is "two hundred twelve million, six hundred eighty-one thousand, nine hundred sixty-four".