85071506 has 8 divisors (see below), whose sum is σ = 137423244. Its totient is φ = 39263760.

The previous prime is 85071491. The next prime is 85071509. The reversal of 85071506 is 60517058.

It can be written as a sum of positive squares in 2 ways, for example, as 84364225 + 707281 = 9185^2 + 841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×85071506² = 14474322266216072, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85071509) 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, 1635965 + ... + 1636016.

Almost surely, 2^85071506 is an apocalyptic number.

85071506 is a deficient number, since it is larger than the sum of its proper divisors (52351738).

85071506 is a wasteful number, since it uses less digits than its factorization.

85071506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271996.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 85071506 is about 9223.4215993849. The cubic root of 85071506 is about 439.8062266594.

The spelling of 85071506 in words is "eighty-five million, seventy-one thousand, five hundred six".