85525619 has 2 divisors, whose sum is σ = 85525620. Its totient is φ = 85525618.

The previous prime is 85525547. The next prime is 85525639. The reversal of 85525619 is 91652558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85525619 is a prime.

It is a super-2 number, since 2×85525619² = 14629263010666322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85525639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42762809 + 42762810.

It is an arithmetic number, because the mean of its divisors is an integer number (42762810).

Almost surely, 2^85525619 is an apocalyptic number.

85525619 is a deficient number, since it is larger than the sum of its proper divisors (1).

85525619 is an equidigital number, since it uses as much as digits as its factorization.

85525619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 41.

The square root of 85525619 is about 9248.0062175585. The cubic root of 85525619 is about 440.5874024490.

The spelling of 85525619 in words is "eighty-five million, five hundred twenty-five thousand, six hundred nineteen".