85722229 has 4 divisors (see below), whose sum is σ = 88039084. Its totient is φ = 83405376.

The previous prime is 85722199. The next prime is 85722239. The reversal of 85722229 is 92222758.

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 34928100 + 50794129 = 5910^2 + 7127^2 .

It is a cyclic number.

It is not a de Polignac number, because 85722229 - 2¹³ = 85714037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 2316817 = 85722229 / (8 + 5 + 7 + 2 + 2 + 2 + 2 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85722239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158372 + ... + 1158445.

It is an arithmetic number, because the mean of its divisors is an integer number (22009771).

Almost surely, 2^85722229 is an apocalyptic number.

It is an amenable number.

85722229 is a deficient number, since it is larger than the sum of its proper divisors (2316855).

85722229 is a wasteful number, since it uses less digits than its factorization.

85722229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316854.

The product of its digits is 40320, while the sum is 37.

The square root of 85722229 is about 9258.6299742456. The cubic root of 85722229 is about 440.9247578777.

It can be divided in two parts, 8572 and 2229, that added together give a palindrome (10801).

The spelling of 85722229 in words is "eighty-five million, seven hundred twenty-two thousand, two hundred twenty-nine".