212860307 has 4 divisors (see below), whose sum is σ = 232211256. Its totient is φ = 193509360.

The previous prime is 212860303. The next prime is 212860313. The reversal of 212860307 is 703068212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212860307 - 2² = 212860303 is a prime.

It is a super-2 number, since 2×212860307² = 90619020592268498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212860307.

It is not an unprimeable number, because it can be changed into a prime (212860301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9675458 + ... + 9675479.

It is an arithmetic number, because the mean of its divisors is an integer number (58052814).

Almost surely, 2^212860307 is an apocalyptic number.

212860307 is a deficient number, since it is larger than the sum of its proper divisors (19350949).

212860307 is a wasteful number, since it uses less digits than its factorization.

212860307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19350948.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 212860307 is about 14589.7329310718. The cubic root of 212860307 is about 597.0786763833.

The spelling of 212860307 in words is "two hundred twelve million, eight hundred sixty thousand, three hundred seven".