81326135 has 16 divisors (see below), whose sum is σ = 106672032. Its totient is φ = 59030400.

The previous prime is 81326129. The next prime is 81326143. The reversal of 81326135 is 53162318.

It is not a de Polignac number, because 81326135 - 2⁸ = 81325879 is a prime.

It is a super-2 number, since 2×81326135² = 13227880468076450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81326098 and 81326107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35237 + ... + 37473.

It is an arithmetic number, because the mean of its divisors is an integer number (6667002).

Almost surely, 2^81326135 is an apocalyptic number.

81326135 is a deficient number, since it is larger than the sum of its proper divisors (25345897).

81326135 is a wasteful number, since it uses less digits than its factorization.

81326135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2914.

The product of its digits is 4320, while the sum is 29.

The square root of 81326135 is about 9018.1004097315. The cubic root of 81326135 is about 433.2547947735.

The spelling of 81326135 in words is "eighty-one million, three hundred twenty-six thousand, one hundred thirty-five".