85015999 has 2 divisors, whose sum is σ = 85016000. Its totient is φ = 85015998.

The previous prime is 85015993. The next prime is 85016011. The reversal of 85015999 is 99951058.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85015999 - 2¹⁵ = 84983231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85015993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42507999 + 42508000.

It is an arithmetic number, because the mean of its divisors is an integer number (42508000).

Almost surely, 2^85015999 is an apocalyptic number.

85015999 is a deficient number, since it is larger than the sum of its proper divisors (1).

85015999 is an equidigital number, since it uses as much as digits as its factorization.

85015999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 46.

The square root of 85015999 is about 9220.4120840665. The cubic root of 85015999 is about 439.7105517118.

The spelling of 85015999 in words is "eighty-five million, fifteen thousand, nine hundred ninety-nine".