85031251 has 4 divisors (see below), whose sum is σ = 89506600. Its totient is φ = 80555904.

The previous prime is 85031231. The next prime is 85031269. The reversal of 85031251 is 15213058.

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 85031251 - 2⁹ = 85030739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85031231) 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 3 ways as a sum of consecutive naturals, for example, 2237646 + ... + 2237683.

It is an arithmetic number, because the mean of its divisors is an integer number (22376650).

Almost surely, 2^85031251 is an apocalyptic number.

85031251 is a deficient number, since it is larger than the sum of its proper divisors (4475349).

85031251 is a wasteful number, since it uses less digits than its factorization.

85031251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4475348.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 85031251 is about 9221.2391249766. The cubic root of 85031251 is about 439.7368450543.

The spelling of 85031251 in words is "eighty-five million, thirty-one thousand, two hundred fifty-one".