85225021 has 4 divisors (see below), whose sum is σ = 97400032. Its totient is φ = 73050012.

The previous prime is 85224977. The next prime is 85225027. The reversal of 85225021 is 12052258.

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 not a de Polignac number, because 85225021 - 2⁹ = 85224509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85225027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6087495 + ... + 6087508.

It is an arithmetic number, because the mean of its divisors is an integer number (24350008).

Almost surely, 2^85225021 is an apocalyptic number.

It is an amenable number.

85225021 is a deficient number, since it is larger than the sum of its proper divisors (12175011).

85225021 is a wasteful number, since it uses less digits than its factorization.

85225021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175010.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 85225021 is about 9231.7398685188. The cubic root of 85225021 is about 440.0706171093.

Adding to 85225021 its reverse (12052258), we get a palindrome (97277279).

The spelling of 85225021 in words is "eighty-five million, two hundred twenty-five thousand, twenty-one".