85881431 has 8 divisors (see below), whose sum is σ = 86780928. Its totient is φ = 84987000.

The previous prime is 85881421. The next prime is 85881437. The reversal of 85881431 is 13418858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85881431 - 2²² = 81687127 is a prime.

It is a super-2 number, since 2×85881431² = 14751240381215522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85881437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39236 + ... + 41366.

It is an arithmetic number, because the mean of its divisors is an integer number (10847616).

Almost surely, 2^85881431 is an apocalyptic number.

85881431 is a deficient number, since it is larger than the sum of its proper divisors (899497).

85881431 is a wasteful number, since it uses less digits than its factorization.

85881431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533.

The product of its digits is 30720, while the sum is 38.

The square root of 85881431 is about 9267.2234784751. The cubic root of 85881431 is about 441.1975486236.

The spelling of 85881431 in words is "eighty-five million, eight hundred eighty-one thousand, four hundred thirty-one".