81516482 has 8 divisors (see below), whose sum is σ = 122673936. Its totient is φ = 40625172.

The previous prime is 81516481. The next prime is 81516493. The reversal of 81516482 is 28461518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (81516481) 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, 65768 + ... + 66995.

It is an arithmetic number, because the mean of its divisors is an integer number (15334242).

Almost surely, 2^81516482 is an apocalyptic number.

81516482 is a deficient number, since it is larger than the sum of its proper divisors (41157454).

81516482 is a wasteful number, since it uses less digits than its factorization.

81516482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133072.

The product of its digits is 15360, while the sum is 35.

The square root of 81516482 is about 9028.6478500382. The cubic root of 81516482 is about 433.5925480001.

The spelling of 81516482 in words is "eighty-one million, five hundred sixteen thousand, four hundred eighty-two".