85757231 has 16 divisors (see below), whose sum is σ = 106583616. Its totient is φ = 67309056.

The previous prime is 85757219. The next prime is 85757237. The reversal of 85757231 is 13275758.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85757231 is a prime.

It is a super-3 number, since 3×85757231³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85757237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5336 + ... + 14141.

It is an arithmetic number, because the mean of its divisors is an integer number (6661476).

Almost surely, 2^85757231 is an apocalyptic number.

85757231 is a deficient number, since it is larger than the sum of its proper divisors (20826385).

85757231 is a wasteful number, since it uses less digits than its factorization.

85757231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19538.

The product of its digits is 58800, while the sum is 38.

The square root of 85757231 is about 9260.5200177960. The cubic root of 85757231 is about 440.9847623381.

The spelling of 85757231 in words is "eighty-five million, seven hundred fifty-seven thousand, two hundred thirty-one".