81413596 has 12 divisors (see below), whose sum is σ = 155426040. Its totient is φ = 37006160.

The previous prime is 81413593. The next prime is 81413609. The reversal of 81413596 is 69531418.

It is a super-2 number, since 2×81413596² = 13256347227302432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81413593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925111 + ... + 925198.

It is an arithmetic number, because the mean of its divisors is an integer number (12952170).

Almost surely, 2^81413596 is an apocalyptic number.

It is an amenable number.

81413596 is a deficient number, since it is larger than the sum of its proper divisors (74012444).

81413596 is a wasteful number, since it uses less digits than its factorization.

81413596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850324 (or 1850322 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 81413596 is about 9022.9482986439. The cubic root of 81413596 is about 433.4100516371.

The spelling of 81413596 in words is "eighty-one million, four hundred thirteen thousand, five hundred ninety-six".