85207651 has 4 divisors (see below), whose sum is σ = 85255632. Its totient is φ = 85159672.

The previous prime is 85207637. The next prime is 85207673. The reversal of 85207651 is 15670258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15670258 = 2 ⋅7835129.

It is a cyclic number.

It is not a de Polignac number, because 85207651 - 2⁷ = 85207523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85207691) 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, 21220 + ... + 24913.

It is an arithmetic number, because the mean of its divisors is an integer number (21313908).

Almost surely, 2^85207651 is an apocalyptic number.

85207651 is a deficient number, since it is larger than the sum of its proper divisors (47981).

85207651 is a wasteful number, since it uses less digits than its factorization.

85207651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47980.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 85207651 is about 9230.7990445031. The cubic root of 85207651 is about 440.0407176506.

It can be divided in two parts, 85207 and 651, that added together give a palindrome (85858).

The spelling of 85207651 in words is "eighty-five million, two hundred seven thousand, six hundred fifty-one".