81134514 has 32 divisors (see below), whose sum is σ = 183262080. Its totient is φ = 26600400.

The previous prime is 81134513. The next prime is 81134527. The reversal of 81134514 is 41543118.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (81134513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9022 + ... + 15609.

It is an arithmetic number, because the mean of its divisors is an integer number (5726940).

Almost surely, 2^81134514 is an apocalyptic number.

81134514 is an abundant number, since it is smaller than the sum of its proper divisors (102127566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81134514 is a wasteful number, since it uses less digits than its factorization.

81134514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24703 (or 24697 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 81134514 is about 9007.4699000330. The cubic root of 81134514 is about 432.9142482112.

The spelling of 81134514 in words is "eighty-one million, one hundred thirty-four thousand, five hundred fourteen".