81483825 has 24 divisors (see below), whose sum is σ = 140580288. Its totient is φ = 41567680.

The previous prime is 81483821. The next prime is 81483869. The reversal of 81483825 is 52838418.

It is not a de Polignac number, because 81483825 - 2² = 81483821 is a prime.

It is a super-2 number, since 2×81483825² = 13279227473261250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81483821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21894 + ... + 25343.

It is an arithmetic number, because the mean of its divisors is an integer number (5857512).

Almost surely, 2^81483825 is an apocalyptic number.

It is an amenable number.

81483825 is a deficient number, since it is larger than the sum of its proper divisors (59096463).

81483825 is a wasteful number, since it uses less digits than its factorization.

81483825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47273 (or 47268 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 81483825 is about 9026.8391477859. The cubic root of 81483825 is about 433.5346385532.

The spelling of 81483825 in words is "eighty-one million, four hundred eighty-three thousand, eight hundred twenty-five".