212244140 has 24 divisors (see below), whose sum is σ = 446852112. Its totient is φ = 84680640.

The previous prime is 212244139. The next prime is 212244157. The reversal of 212244140 is 41442212.

212244140 is nontrivially palindromic in base 16.

212244140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 5426 + ... + 21305.

It is an arithmetic number, because the mean of its divisors is an integer number (18618838).

Almost surely, 2^212244140 is an apocalyptic number.

212244140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212244140 is an abundant number, since it is smaller than the sum of its proper divisors (234607972).

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

212244140 is a wasteful number, since it uses less digits than its factorization.

212244140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27137 (or 27135 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 212244140 is about 14568.6011682659. The cubic root of 212244140 is about 596.5019981211.

Adding to 212244140 its reverse (41442212), we get a palindrome (253686352).

The spelling of 212244140 in words is "two hundred twelve million, two hundred forty-four thousand, one hundred forty".