212245720 has 16 divisors (see below), whose sum is σ = 477552960. Its totient is φ = 84898272.

The previous prime is 212245717. The next prime is 212245739. The reversal of 212245720 is 27542212.

212245720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2653032 + ... + 2653111.

It is an arithmetic number, because the mean of its divisors is an integer number (29847060).

Almost surely, 2^212245720 is an apocalyptic number.

212245720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212245720 is an abundant number, since it is smaller than the sum of its proper divisors (265307240).

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

212245720 is a wasteful number, since it uses less digits than its factorization.

212245720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306154 (or 5306150 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 212245720 is about 14568.6553943732. The cubic root of 212245720 is about 596.5034782889.

Adding to 212245720 its reverse (27542212), we get a palindrome (239787932).

The spelling of 212245720 in words is "two hundred twelve million, two hundred forty-five thousand, seven hundred twenty".