85481539 has 24 divisors (see below), whose sum is σ = 104510336. Its totient is φ = 69379200.

The previous prime is 85481521. The next prime is 85481567. The reversal of 85481539 is 93518458.

It is not a de Polignac number, because 85481539 - 2⁷ = 85481411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85481495 and 85481504.

It is not an unprimeable number, because it can be changed into a prime (85481509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47887 + ... + 49639.

Almost surely, 2^85481539 is an apocalyptic number.

85481539 is a deficient number, since it is larger than the sum of its proper divisors (19028797).

85481539 is a wasteful number, since it uses less digits than its factorization.

85481539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819 (or 1808 counting only the distinct ones).

The product of its digits is 172800, while the sum is 43.

The square root of 85481539 is about 9245.6226940104. The cubic root of 85481539 is about 440.5116963606.

The spelling of 85481539 in words is "eighty-five million, four hundred eighty-one thousand, five hundred thirty-nine".