85825819 has 8 divisors (see below), whose sum is σ = 89303760. Its totient is φ = 82382496.

The previous prime is 85825813. The next prime is 85825823. The reversal of 85825819 is 91852858.

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

It is a cyclic number.

It is not a de Polignac number, because 85825819 - 2¹⁵ = 85793051 is a prime.

It is a super-2 number, since 2×85825819² = 14732142414041522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85825813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3537 + ... + 13570.

It is an arithmetic number, because the mean of its divisors is an integer number (11162970).

Almost surely, 2^85825819 is an apocalyptic number.

85825819 is a deficient number, since it is larger than the sum of its proper divisors (3477941).

85825819 is a wasteful number, since it uses less digits than its factorization.

85825819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17309.

The product of its digits is 230400, while the sum is 46.

The square root of 85825819 is about 9264.2225253931. Note that the first 3 decimals coincide. The cubic root of 85825819 is about 441.1022964614.

The spelling of 85825819 in words is "eighty-five million, eight hundred twenty-five thousand, eight hundred nineteen".