85931251 has 12 divisors (see below), whose sum is σ = 100117080. Its totient is φ = 73540320.

The previous prime is 85931239. The next prime is 85931257. The reversal of 85931251 is 15213958.

It is not a de Polignac number, because 85931251 - 2⁹ = 85930739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85931257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49071 + ... + 50791.

It is an arithmetic number, because the mean of its divisors is an integer number (8343090).

Almost surely, 2^85931251 is an apocalyptic number.

85931251 is a deficient number, since it is larger than the sum of its proper divisors (14185829).

85931251 is a wasteful number, since it uses less digits than its factorization.

85931251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754 (or 2747 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 85931251 is about 9269.9110567470. The cubic root of 85931251 is about 441.2828453429.

The spelling of 85931251 in words is "eighty-five million, nine hundred thirty-one thousand, two hundred fifty-one".