85670015 has 12 divisors (see below), whose sum is σ = 103572792. Its totient is φ = 68027040.

The previous prime is 85670003. The next prime is 85670017. The reversal of 85670015 is 51007658.

It is not a de Polignac number, because 85670015 - 2⁴ = 85669999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85670017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163544 + ... + 164066.

It is an arithmetic number, because the mean of its divisors is an integer number (8631066).

Almost surely, 2^85670015 is an apocalyptic number.

85670015 is a deficient number, since it is larger than the sum of its proper divisors (17902777).

85670015 is an equidigital number, since it uses as much as digits as its factorization.

85670015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 709 counting only the distinct ones).

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

The square root of 85670015 is about 9255.8097970950. The cubic root of 85670015 is about 440.8352162596.

The spelling of 85670015 in words is "eighty-five million, six hundred seventy thousand, fifteen".