212499340 has 24 divisors (see below), whose sum is σ = 448110432. Its totient is φ = 84645120.

The previous prime is 212499319. The next prime is 212499349. The reversal of 212499340 is 43994212.

It is a junction number, because it is equal to n+sod(n) for n = 212499296 and 212499305.

It is not an unprimeable number, because it can be changed into a prime (212499349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17224 + ... + 26863.

It is an arithmetic number, because the mean of its divisors is an integer number (18671268).

Almost surely, 2^212499340 is an apocalyptic number.

212499340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212499340 is an abundant number, since it is smaller than the sum of its proper divisors (235611092).

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

212499340 is a wasteful number, since it uses less digits than its factorization.

212499340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44337 (or 44335 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 212499340 is about 14577.3570992824. The cubic root of 212499340 is about 596.7409781600.

The spelling of 212499340 in words is "two hundred twelve million, four hundred ninety-nine thousand, three hundred forty".