212281140 has 48 divisors (see below), whose sum is σ = 607041792. Its totient is φ = 55403136.

The previous prime is 212281133. The next prime is 212281141. The reversal of 212281140 is 41182212.

212281140 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 not an unprimeable number, because it can be changed into a prime (212281141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34819 + ... + 40458.

It is an arithmetic number, because the mean of its divisors is an integer number (12646704).

Almost surely, 2^212281140 is an apocalyptic number.

212281140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212281140 is an abundant number, since it is smaller than the sum of its proper divisors (394760652).

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

212281140 is a wasteful number, since it uses less digits than its factorization.

212281140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75336 (or 75334 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 212281140 is about 14569.8709671706. The cubic root of 212281140 is about 596.5366583502.

The spelling of 212281140 in words is "two hundred twelve million, two hundred eighty-one thousand, one hundred forty".