81625483 has 4 divisors (see below), whose sum is σ = 86427000. Its totient is φ = 76823968.

The previous prime is 81625457. The next prime is 81625487. The reversal of 81625483 is 38452618.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81625483 - 2²¹ = 79528331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81625487) 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 3 ways as a sum of consecutive naturals, for example, 2400733 + ... + 2400766.

It is an arithmetic number, because the mean of its divisors is an integer number (21606750).

Almost surely, 2^81625483 is an apocalyptic number.

81625483 is a deficient number, since it is larger than the sum of its proper divisors (4801517).

81625483 is a wasteful number, since it uses less digits than its factorization.

81625483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801516.

The product of its digits is 46080, while the sum is 37.

The square root of 81625483 is about 9034.6822301617. The cubic root of 81625483 is about 433.7857235400.

The spelling of 81625483 in words is "eighty-one million, six hundred twenty-five thousand, four hundred eighty-three".