85225561 has 4 divisors (see below), whose sum is σ = 85601232. Its totient is φ = 84849892.

The previous prime is 85225513. The next prime is 85225571. The reversal of 85225561 is 16552258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85225561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85225571) 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 in 3 ways as a sum of consecutive naturals, for example, 187495 + ... + 187948.

It is an arithmetic number, because the mean of its divisors is an integer number (21400308).

Almost surely, 2^85225561 is an apocalyptic number.

It is an amenable number.

85225561 is a deficient number, since it is larger than the sum of its proper divisors (375671).

85225561 is a wasteful number, since it uses less digits than its factorization.

85225561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375670.

The product of its digits is 24000, while the sum is 34.

The square root of 85225561 is about 9231.7691153971. The cubic root of 85225561 is about 440.0715465611.

The spelling of 85225561 in words is "eighty-five million, two hundred twenty-five thousand, five hundred sixty-one".