85375431 has 16 divisors (see below), whose sum is σ = 126705120. Its totient is φ = 56816640.

The previous prime is 85375393. The next prime is 85375439. The reversal of 85375431 is 13457358.

85375431 is a `hidden beast` number, since 85 + 37 + 543 + 1 = 666.

It is not a de Polignac number, because 85375431 - 2¹⁴ = 85359047 is a prime.

It is a super-2 number, since 2×85375431² = 14577928436871522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85375439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14841 + ... + 19773.

It is an arithmetic number, because the mean of its divisors is an integer number (7919070).

Almost surely, 2^85375431 is an apocalyptic number.

85375431 is a deficient number, since it is larger than the sum of its proper divisors (41329689).

85375431 is a wasteful number, since it uses less digits than its factorization.

85375431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5583 (or 5577 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 85375431 is about 9239.8826291247. The cubic root of 85375431 is about 440.3293522384.

The spelling of 85375431 in words is "eighty-five million, three hundred seventy-five thousand, four hundred thirty-one".