85265431 has 4 divisors (see below), whose sum is σ = 87248392. Its totient is φ = 83282472.

The previous prime is 85265429. The next prime is 85265441. The reversal of 85265431 is 13456258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13456258 = 2 ⋅6728129.

It is a cyclic number.

It is not a de Polignac number, because 85265431 - 2¹ = 85265429 is a prime.

It is a super-2 number, since 2×85265431² = 14540387447231522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85265441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991416 + ... + 991501.

It is an arithmetic number, because the mean of its divisors is an integer number (21812098).

Almost surely, 2^85265431 is an apocalyptic number.

85265431 is a deficient number, since it is larger than the sum of its proper divisors (1982961).

85265431 is a wasteful number, since it uses less digits than its factorization.

85265431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982960.

The product of its digits is 28800, while the sum is 34.

The square root of 85265431 is about 9233.9282539989. The cubic root of 85265431 is about 440.1401602376.

The spelling of 85265431 in words is "eighty-five million, two hundred sixty-five thousand, four hundred thirty-one".