85822781 has 8 divisors (see below), whose sum is σ = 93731904. Its totient is φ = 77931520.

The previous prime is 85822769. The next prime is 85822823. The reversal of 85822781 is 18722858.

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 85822781 - 2¹⁴ = 85806397 is a prime.

It is a super-2 number, since 2×85822781² = 14731099477147922, 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 (85822081) 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, 6845 + ... + 14781.

It is an arithmetic number, because the mean of its divisors is an integer number (11716488).

Almost surely, 2^85822781 is an apocalyptic number.

It is an amenable number.

85822781 is a deficient number, since it is larger than the sum of its proper divisors (7909123).

85822781 is a wasteful number, since it uses less digits than its factorization.

85822781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8931.

The product of its digits is 71680, while the sum is 41.

The square root of 85822781 is about 9264.0585598322. The cubic root of 85822781 is about 441.0970917937.

The spelling of 85822781 in words is "eighty-five million, eight hundred twenty-two thousand, seven hundred eighty-one".