212140144 has 20 divisors (see below), whose sum is σ = 435199824. Its totient is φ = 99830528.

The previous prime is 212140141. The next prime is 212140151. The reversal of 212140144 is 441041212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212140141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389692 + ... + 390235.

Almost surely, 2^212140144 is an apocalyptic number.

It is an amenable number.

212140144 is an abundant number, since it is smaller than the sum of its proper divisors (223059680).

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

212140144 is a wasteful number, since it uses less digits than its factorization.

212140144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779952 (or 779946 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 212140144 is about 14565.0315481979. The cubic root of 212140144 is about 596.4045569441.

Adding to 212140144 its reverse (441041212), we get a palindrome (653181356).

The spelling of 212140144 in words is "two hundred twelve million, one hundred forty thousand, one hundred forty-four".