212973340 has 12 divisors (see below), whose sum is σ = 447244056. Its totient is φ = 85189328.

The previous prime is 212973323. The next prime is 212973359. The reversal of 212973340 is 43379212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5324314 + ... + 5324353.

It is an arithmetic number, because the mean of its divisors is an integer number (37270338).

Almost surely, 2^212973340 is an apocalyptic number.

212973340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212973340 is an abundant number, since it is smaller than the sum of its proper divisors (234270716).

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

212973340 is a wasteful number, since it uses less digits than its factorization.

212973340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10648676 (or 10648674 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 212973340 is about 14593.6061341945. The cubic root of 212973340 is about 597.1843445128.

The spelling of 212973340 in words is "two hundred twelve million, nine hundred seventy-three thousand, three hundred forty".