85238251 has 8 divisors (see below), whose sum is σ = 100557824. Its totient is φ = 70704360.

The previous prime is 85238227. The next prime is 85238297. The reversal of 85238251 is 15283258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85238251 - 2¹⁹ = 84713963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85238651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196185 + ... + 196618.

It is an arithmetic number, because the mean of its divisors is an integer number (12569728).

Almost surely, 2^85238251 is an apocalyptic number.

85238251 is a deficient number, since it is larger than the sum of its proper divisors (15319573).

85238251 is a wasteful number, since it uses less digits than its factorization.

85238251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392841.

The product of its digits is 19200, while the sum is 34.

The square root of 85238251 is about 9232.4563903655. The cubic root of 85238251 is about 440.0933875468.

The spelling of 85238251 in words is "eighty-five million, two hundred thirty-eight thousand, two hundred fifty-one".