85008251 has 4 divisors (see below), whose sum is σ = 87939600. Its totient is φ = 82076904.

The previous prime is 85008247. The next prime is 85008263. The reversal of 85008251 is 15280058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15280058 = 2 ⋅7640029.

It is a cyclic number.

It is not a de Polignac number, because 85008251 - 2² = 85008247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 2931319 = 85008251 / (8 + 5 + 0 + 0 + 8 + 2 + 5 + 1).

It is not an unprimeable number, because it can be changed into a prime (85008241) 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, 1465631 + ... + 1465688.

It is an arithmetic number, because the mean of its divisors is an integer number (21984900).

Almost surely, 2^85008251 is an apocalyptic number.

85008251 is a deficient number, since it is larger than the sum of its proper divisors (2931349).

85008251 is a wasteful number, since it uses less digits than its factorization.

85008251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931348.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 85008251 is about 9219.9919197362. The cubic root of 85008251 is about 439.6971935169.

The spelling of 85008251 in words is "eighty-five million, eight thousand, two hundred fifty-one".