85255257 has 4 divisors (see below), whose sum is σ = 113673680. Its totient is φ = 56836836.

The previous prime is 85255249. The next prime is 85255297. The reversal of 85255257 is 75255258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 85255257 - 2³ = 85255249 is a prime.

It is a super-2 number, since 2×85255257² = 14536917692272098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85255297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14209207 + ... + 14209212.

It is an arithmetic number, because the mean of its divisors is an integer number (28418420).

Almost surely, 2^85255257 is an apocalyptic number.

It is an amenable number.

85255257 is a deficient number, since it is larger than the sum of its proper divisors (28418423).

85255257 is a wasteful number, since it uses less digits than its factorization.

85255257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28418422.

The product of its digits is 140000, while the sum is 39.

The square root of 85255257 is about 9233.3773344319. The cubic root of 85255257 is about 440.1226534784.

Subtracting from 85255257 its reverse (75255258), we obtain a palindrome (9999999).

The spelling of 85255257 in words is "eighty-five million, two hundred fifty-five thousand, two hundred fifty-seven".