85912213 has 4 divisors (see below), whose sum is σ = 86357548. Its totient is φ = 85466880.

The previous prime is 85912171. The next prime is 85912231. The reversal of 85912213 is 31221958.

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 57790404 + 28121809 = 7602^2 + 5303^2 .

It is a cyclic number.

It is not a de Polignac number, because 85912213 - 2⁹ = 85911701 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 (85912913) 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, 222378 + ... + 222763.

It is an arithmetic number, because the mean of its divisors is an integer number (21589387).

Almost surely, 2^85912213 is an apocalyptic number.

It is an amenable number.

85912213 is a deficient number, since it is larger than the sum of its proper divisors (445335).

85912213 is a wasteful number, since it uses less digits than its factorization.

85912213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445334.

The product of its digits is 4320, while the sum is 31.

The square root of 85912213 is about 9268.8841291711. The cubic root of 85912213 is about 441.2502543154.

The spelling of 85912213 in words is "eighty-five million, nine hundred twelve thousand, two hundred thirteen".