185273213 has 6 divisors (see below), whose sum is σ = 188837754. Its totient is φ = 181774736.

The previous prime is 185273189. The next prime is 185273227. The reversal of 185273213 is 312372581.

It can be written as a sum of positive squares in 3 ways, for example, as 65983129 + 119290084 = 8123^2 + 10922^2 .

It is not a de Polignac number, because 185273213 - 2⁶ = 185273149 is a prime.

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 185273213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185273233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30170 + ... + 35787.

It is an arithmetic number, because the mean of its divisors is an integer number (31472959).

Almost surely, 2^185273213 is an apocalyptic number.

It is an amenable number.

185273213 is a deficient number, since it is larger than the sum of its proper divisors (3564541).

185273213 is an frugal number, since it uses more digits than its factorization.

185273213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66063 (or 66010 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 185273213 is about 13611.5103129667. The cubic root of 185273213 is about 570.0822831865.

The spelling of 185273213 in words is "one hundred eighty-five million, two hundred seventy-three thousand, two hundred thirteen".