81134056 has 16 divisors (see below), whose sum is σ = 152901540. Its totient is φ = 40360320.

The previous prime is 81134051. The next prime is 81134057. The reversal of 81134056 is 65043118.

It can be written as a sum of positive squares in 2 ways, for example, as 78605956 + 2528100 = 8866^2 + 1590^2 .

It is a super-2 number, since 2×81134056² = 13165470086022272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81134051) 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, 24165 + ... + 27316.

Almost surely, 2^81134056 is an apocalyptic number.

It is an amenable number.

81134056 is a deficient number, since it is larger than the sum of its proper divisors (71767484).

81134056 is a wasteful number, since it uses less digits than its factorization.

81134056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51684 (or 51680 counting only the distinct ones).

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

The square root of 81134056 is about 9007.4444766537. Note that the first 4 decimals coincide. The cubic root of 81134056 is about 432.9134336171.

It can be divided in two parts, 8113 and 4056, that multiplied together give a triangular number (32906328 = T₈₁₁₂).

The spelling of 81134056 in words is "eighty-one million, one hundred thirty-four thousand, fifty-six".