85145651 has 4 divisors (see below), whose sum is σ = 85171632. Its totient is φ = 85119672.

The previous prime is 85145611. The next prime is 85145659. The reversal of 85145651 is 15654158.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85145651 - 2⁶ = 85145587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85145659) 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, 7220 + ... + 14913.

It is an arithmetic number, because the mean of its divisors is an integer number (21292908).

Almost surely, 2^85145651 is an apocalyptic number.

85145651 is a deficient number, since it is larger than the sum of its proper divisors (25981).

85145651 is a wasteful number, since it uses less digits than its factorization.

85145651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25980.

The product of its digits is 24000, while the sum is 35.

The square root of 85145651 is about 9227.4401108867. The cubic root of 85145651 is about 439.9339621966.

The spelling of 85145651 in words is "eighty-five million, one hundred forty-five thousand, six hundred fifty-one".