81545482 has 8 divisors (see below), whose sum is σ = 124626276. Its totient is φ = 40003392.

The previous prime is 81545461. The next prime is 81545489. The reversal of 81545482 is 28454518.

It can be written as a sum of positive squares in 2 ways, for example, as 72777961 + 8767521 = 8531^2 + 2961^2 .

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

It is a super-2 number, since 2×81545482² = 13299331269224648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81545489) 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, 384543 + ... + 384754.

Almost surely, 2^81545482 is an apocalyptic number.

81545482 is a deficient number, since it is larger than the sum of its proper divisors (43080794).

81545482 is a wasteful number, since it uses less digits than its factorization.

81545482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769352.

The product of its digits is 51200, while the sum is 37.

The square root of 81545482 is about 9030.2537062920. The cubic root of 81545482 is about 433.6439596605.

The spelling of 81545482 in words is "eighty-one million, five hundred forty-five thousand, four hundred eighty-two".