212140073 has 4 divisors (see below), whose sum is σ = 223305360. Its totient is φ = 200974788.

The previous prime is 212140069. The next prime is 212140081. The reversal of 212140073 is 370041212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212140073 - 2² = 212140069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212140013) 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, 5582615 + ... + 5582652.

It is an arithmetic number, because the mean of its divisors is an integer number (55826340).

Almost surely, 2^212140073 is an apocalyptic number.

It is an amenable number.

212140073 is a deficient number, since it is larger than the sum of its proper divisors (11165287).

212140073 is a wasteful number, since it uses less digits than its factorization.

212140073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11165286.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 212140073 is about 14565.0291108532. The cubic root of 212140073 is about 596.4044904084.

Adding to 212140073 its reverse (370041212), we get a palindrome (582181285).

The spelling of 212140073 in words is "two hundred twelve million, one hundred forty thousand, seventy-three".