85981371 has 16 divisors (see below), whose sum is σ = 132816384. Its totient is φ = 48458304.

The previous prime is 85981331. The next prime is 85981411. The reversal of 85981371 is 17318958.

It is an interprime number because it is at equal distance from previous prime (85981331) and next prime (85981411).

It is not a de Polignac number, because 85981371 - 2¹⁰ = 85980347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85981331) 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, 26511 + ... + 29576.

It is an arithmetic number, because the mean of its divisors is an integer number (8301024).

Almost surely, 2^85981371 is an apocalyptic number.

85981371 is a deficient number, since it is larger than the sum of its proper divisors (46835013).

85981371 is a wasteful number, since it uses less digits than its factorization.

85981371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56170.

The product of its digits is 60480, while the sum is 42.

The square root of 85981371 is about 9272.6140327310. The cubic root of 85981371 is about 441.3686224316.

The spelling of 85981371 in words is "eighty-five million, nine hundred eighty-one thousand, three hundred seventy-one".