85843431 has 6 divisors (see below), whose sum is σ = 123996080. Its totient is φ = 57228948.

The previous prime is 85843423. The next prime is 85843447. The reversal of 85843431 is 13434858.

It is not a de Polignac number, because 85843431 - 2³ = 85843423 is a prime.

It is a super-2 number, since 2×85843431² = 14738189291703522, 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 (85843631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4769071 + ... + 4769088.

Almost surely, 2^85843431 is an apocalyptic number.

85843431 is a deficient number, since it is larger than the sum of its proper divisors (38152649).

85843431 is a wasteful number, since it uses less digits than its factorization.

85843431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9538165 (or 9538162 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 85843431 is about 9265.1730151142. The cubic root of 85843431 is about 441.1324667233.

The spelling of 85843431 in words is "eighty-five million, eight hundred forty-three thousand, four hundred thirty-one".