85112431 has 2 divisors, whose sum is σ = 85112432. Its totient is φ = 85112430.

The previous prime is 85112429. The next prime is 85112473. The reversal of 85112431 is 13421158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85112431 - 2¹ = 85112429 is a prime.

It is a super-2 number, since 2×85112431² = 14488251821459522, which contains 22 as substring.

Together with 85112429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 85112396 and 85112405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85112231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42556215 + 42556216.

It is an arithmetic number, because the mean of its divisors is an integer number (42556216).

Almost surely, 2^85112431 is an apocalyptic number.

85112431 is a deficient number, since it is larger than the sum of its proper divisors (1).

85112431 is an equidigital number, since it uses as much as digits as its factorization.

85112431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 85112431 is about 9225.6398694074. The cubic root of 85112431 is about 439.8767406117.

Adding to 85112431 its reverse (13421158), we get a palindrome (98533589).

The spelling of 85112431 in words is "eighty-five million, one hundred twelve thousand, four hundred thirty-one".