85841531 has 4 divisors (see below), whose sum is σ = 85860864. Its totient is φ = 85822200.

The previous prime is 85841521. The next prime is 85841593. The reversal of 85841531 is 13514858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85841531 - 2¹⁸ = 85579387 is a prime.

It is a super-2 number, since 2×85841531² = 14737536888847922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85841491 and 85841500.

It is not an unprimeable number, because it can be changed into a prime (85841521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 701 + ... + 13121.

It is an arithmetic number, because the mean of its divisors is an integer number (21465216).

Almost surely, 2^85841531 is an apocalyptic number.

85841531 is a deficient number, since it is larger than the sum of its proper divisors (19333).

85841531 is a wasteful number, since it uses less digits than its factorization.

85841531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19332.

The product of its digits is 19200, while the sum is 35.

The square root of 85841531 is about 9265.0704800341. The cubic root of 85841531 is about 441.1292121241.

The spelling of 85841531 in words is "eighty-five million, eight hundred forty-one thousand, five hundred thirty-one".