81314056 has 16 divisors (see below), whose sum is σ = 152921340. Its totient is φ = 40535040.

The previous prime is 81314047. The next prime is 81314059. The reversal of 81314056 is 65041318.

It can be written as a sum of positive squares in 2 ways, for example, as 81180100 + 133956 = 9010^2 + 366^2 .

It is a super-2 number, since 2×81314056² = 13223951406342272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81314059) 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, 12385 + ... + 17776.

Almost surely, 2^81314056 is an apocalyptic number.

It is an amenable number.

81314056 is a deficient number, since it is larger than the sum of its proper divisors (71607284).

81314056 is a wasteful number, since it uses less digits than its factorization.

81314056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30504 (or 30500 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 81314056 is about 9017.4306761960. The cubic root of 81314056 is about 433.2333439251.

The spelling of 81314056 in words is "eighty-one million, three hundred fourteen thousand, fifty-six".