212722373 has 4 divisors (see below), whose sum is σ = 213802380. Its totient is φ = 211642368.

The previous prime is 212722303. The next prime is 212722379. The reversal of 212722373 is 373227212.

It is a happy number.

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 144048004 + 68674369 = 12002^2 + 8287^2 .

It is a cyclic number.

It is not a de Polignac number, because 212722373 - 2⁸ = 212722117 is a prime.

It is a super-2 number, since 2×212722373² = 90501615949502258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212722379) 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, 539708 + ... + 540101.

It is an arithmetic number, because the mean of its divisors is an integer number (53450595).

Almost surely, 2^212722373 is an apocalyptic number.

It is an amenable number.

212722373 is a deficient number, since it is larger than the sum of its proper divisors (1080007).

212722373 is a wasteful number, since it uses less digits than its factorization.

212722373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080006.

The product of its digits is 7056, while the sum is 29.

The square root of 212722373 is about 14585.0050737050. The cubic root of 212722373 is about 596.9496790344.

Adding to 212722373 its reverse (373227212), we get a palindrome (585949585).

The spelling of 212722373 in words is "two hundred twelve million, seven hundred twenty-two thousand, three hundred seventy-three".