85473251 has 2 divisors, whose sum is σ = 85473252. Its totient is φ = 85473250.

The previous prime is 85473209. The next prime is 85473253. The reversal of 85473251 is 15237458.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85473251 - 2⁶ = 85473187 is a prime.

Together with 85473253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85473253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42736625 + 42736626.

It is an arithmetic number, because the mean of its divisors is an integer number (42736626).

Almost surely, 2^85473251 is an apocalyptic number.

85473251 is a deficient number, since it is larger than the sum of its proper divisors (1).

85473251 is an equidigital number, since it uses as much as digits as its factorization.

85473251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 85473251 is about 9245.1744710416. The cubic root of 85473251 is about 440.4974590606.

The spelling of 85473251 in words is "eighty-five million, four hundred seventy-three thousand, two hundred fifty-one".