85251473 has 2 divisors, whose sum is σ = 85251474. Its totient is φ = 85251472.

The previous prime is 85251449. The next prime is 85251479. The reversal of 85251473 is 37415258.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68178049 + 17073424 = 8257^2 + 4132^2 .

It is a cyclic number.

It is not a de Polignac number, because 85251473 - 2¹² = 85247377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4957433 and since 85251473 and 4957433 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85251479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42625736 + 42625737.

It is an arithmetic number, because the mean of its divisors is an integer number (42625737).

Almost surely, 2^85251473 is an apocalyptic number.

It is an amenable number.

85251473 is a deficient number, since it is larger than the sum of its proper divisors (1).

85251473 is an equidigital number, since it uses as much as digits as its factorization.

85251473 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 85251473 is about 9233.1724233873. The cubic root of 85251473 is about 440.1161418613.

It can be divided in two parts, 852 and 51473, that added together give a palindrome (52325).

The spelling of 85251473 in words is "eighty-five million, two hundred fifty-one thousand, four hundred seventy-three".