85275431 has 2 divisors, whose sum is σ = 85275432. Its totient is φ = 85275430.

The previous prime is 85275419. The next prime is 85275479. The reversal of 85275431 is 13457258.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85275431 - 2¹⁴ = 85259047 is a prime.

It is a super-2 number, since 2×85275431² = 14543798264471522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85275391 and 85275400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85275031) 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 as a sum of consecutive naturals, namely, 42637715 + 42637716.

It is an arithmetic number, because the mean of its divisors is an integer number (42637716).

Almost surely, 2^85275431 is an apocalyptic number.

85275431 is a deficient number, since it is larger than the sum of its proper divisors (1).

85275431 is an equidigital number, since it uses as much as digits as its factorization.

85275431 is an odious number, because the sum of its binary digits is odd.

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

The square root of 85275431 is about 9234.4697194804. The cubic root of 85275431 is about 440.1573662318.

The spelling of 85275431 in words is "eighty-five million, two hundred seventy-five thousand, four hundred thirty-one".