212481940 has 48 divisors (see below), whose sum is σ = 512406720. Its totient is φ = 73198080.

The previous prime is 212481911. The next prime is 212481947. The reversal of 212481940 is 49184212.

212481940 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 (212481947) 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, 21237 + ... + 29596.

It is an arithmetic number, because the mean of its divisors is an integer number (10675140).

Almost surely, 2^212481940 is an apocalyptic number.

212481940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212481940 is an abundant number, since it is smaller than the sum of its proper divisors (299924780).

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

212481940 is a wasteful number, since it uses less digits than its factorization.

212481940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50872 (or 50870 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 212481940 is about 14576.7602710616. The cubic root of 212481940 is about 596.7246901463.

The spelling of 212481940 in words is "two hundred twelve million, four hundred eighty-one thousand, nine hundred forty".