212700073 has 4 divisors (see below), whose sum is σ = 225211860. Its totient is φ = 200188288.

The previous prime is 212700043. The next prime is 212700091. The reversal of 212700073 is 370007212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76090729 + 136609344 = 8723^2 + 11688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212700073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212700043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6255868 + ... + 6255901.

It is an arithmetic number, because the mean of its divisors is an integer number (56302965).

Almost surely, 2^212700073 is an apocalyptic number.

It is an amenable number.

212700073 is a deficient number, since it is larger than the sum of its proper divisors (12511787).

212700073 is a wasteful number, since it uses less digits than its factorization.

212700073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12511786.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 212700073 is about 14584.2405698754. The cubic root of 212700073 is about 596.9288186005.

Adding to 212700073 its reverse (370007212), we get a palindrome (582707285).

The spelling of 212700073 in words is "two hundred twelve million, seven hundred thousand, seventy-three".