85017147531 has 4 divisors (see below), whose sum is σ = 113356196712. Its totient is φ = 56678098352.

The previous prime is 85017147521. The next prime is 85017147539. The reversal of 85017147531 is 13574171058.

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 85017147531 - 2⁷ = 85017147403 is a prime.

It is a super-2 number, since 2×85017147531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85017147539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14169524586 + ... + 14169524591.

It is an arithmetic number, because the mean of its divisors is an integer number (28339049178).

Almost surely, 2^85017147531 is an apocalyptic number.

85017147531 is a deficient number, since it is larger than the sum of its proper divisors (28339049181).

85017147531 is a wasteful number, since it uses less digits than its factorization.

85017147531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28339049180.

The product of its (nonzero) digits is 117600, while the sum is 42.

The spelling of 85017147531 in words is "eighty-five billion, seventeen million, one hundred forty-seven thousand, five hundred thirty-one".