212273903 has 4 divisors (see below), whose sum is σ = 214221480. Its totient is φ = 210326328.

The previous prime is 212273899. The next prime is 212273953. The reversal of 212273903 is 309372212.

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

It is a cyclic number.

It is not a de Polignac number, because 212273903 - 2² = 212273899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212273953) 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, 973625 + ... + 973842.

It is an arithmetic number, because the mean of its divisors is an integer number (53555370).

Almost surely, 2^212273903 is an apocalyptic number.

212273903 is a deficient number, since it is larger than the sum of its proper divisors (1947577).

212273903 is a wasteful number, since it uses less digits than its factorization.

212273903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947576.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 212273903 is about 14569.6226100747. The cubic root of 212273903 is about 596.5298793136.

The spelling of 212273903 in words is "two hundred twelve million, two hundred seventy-three thousand, nine hundred three".