85224815 has 16 divisors (see below), whose sum is σ = 111470688. Its totient is φ = 62173056.

The previous prime is 85224803. The next prime is 85224827. The reversal of 85224815 is 51842258.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85224803) and next prime (85224827).

It is a cyclic number.

It is not a de Polignac number, because 85224815 - 2¹⁸ = 84962671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2504 + ... + 13293.

It is an arithmetic number, because the mean of its divisors is an integer number (6966918).

Almost surely, 2^85224815 is an apocalyptic number.

85224815 is a deficient number, since it is larger than the sum of its proper divisors (26245873).

85224815 is a wasteful number, since it uses less digits than its factorization.

85224815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15898.

The product of its digits is 25600, while the sum is 35.

The square root of 85224815 is about 9231.7287113520. The cubic root of 85224815 is about 440.0702625397.

The spelling of 85224815 in words is "eighty-five million, two hundred twenty-four thousand, eight hundred fifteen".