81362375 has 16 divisors (see below), whose sum is σ = 101795616. Its totient is φ = 64926400.

The previous prime is 81362363. The next prime is 81362377. The reversal of 81362375 is 57326318.

It is not a de Polignac number, because 81362375 - 2¹⁰ = 81361351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81362377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84899 + ... + 85851.

It is an arithmetic number, because the mean of its divisors is an integer number (6362226).

Almost surely, 2^81362375 is an apocalyptic number.

81362375 is a deficient number, since it is larger than the sum of its proper divisors (20433241).

81362375 is an equidigital number, since it uses as much as digits as its factorization.

81362375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1641 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 81362375 is about 9020.1094782713. The cubic root of 81362375 is about 433.3191399033.

The spelling of 81362375 in words is "eighty-one million, three hundred sixty-two thousand, three hundred seventy-five".