81325735 has 4 divisors (see below), whose sum is σ = 97590888. Its totient is φ = 65060584.

The previous prime is 81325721. The next prime is 81325747. The reversal of 81325735 is 53752318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81325735 - 2¹³ = 81317543 is a prime.

It is a super-2 number, since 2×81325735² = 13227750346580450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81325735.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8132569 + ... + 8132578.

It is an arithmetic number, because the mean of its divisors is an integer number (24397722).

Almost surely, 2^81325735 is an apocalyptic number.

81325735 is a deficient number, since it is larger than the sum of its proper divisors (16265153).

81325735 is a wasteful number, since it uses less digits than its factorization.

81325735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16265152.

The product of its digits is 25200, while the sum is 34.

The square root of 81325735 is about 9018.0782320847. The cubic root of 81325735 is about 433.2540844557.

The spelling of 81325735 in words is "eighty-one million, three hundred twenty-five thousand, seven hundred thirty-five".