212939140 has 24 divisors (see below), whose sum is σ = 456688512. Its totient is φ = 83363040.

The previous prime is 212939119. The next prime is 212939147. The reversal of 212939140 is 41939212.

It is not an unprimeable number, because it can be changed into a prime (212939147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112326 + ... + 114205.

It is an arithmetic number, because the mean of its divisors is an integer number (19028688).

Almost surely, 2^212939140 is an apocalyptic number.

212939140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212939140 is an abundant number, since it is smaller than the sum of its proper divisors (243749372).

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

212939140 is a wasteful number, since it uses less digits than its factorization.

212939140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226587 (or 226585 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 212939140 is about 14592.4343411235. The cubic root of 212939140 is about 597.1523768216.

The spelling of 212939140 in words is "two hundred twelve million, nine hundred thirty-nine thousand, one hundred forty".