81486325 has 6 divisors (see below), whose sum is σ = 101043074. Its totient is φ = 65189040.

The previous prime is 81486241. The next prime is 81486359. The reversal of 81486325 is 52368418.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8520561 + 72965764 = 2919^2 + 8542^2 .

It is not a de Polignac number, because 81486325 - 2²⁵ = 47931893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1629702 + ... + 1629751.

Almost surely, 2^81486325 is an apocalyptic number.

It is an amenable number.

81486325 is a deficient number, since it is larger than the sum of its proper divisors (19556749).

81486325 is a wasteful number, since it uses less digits than its factorization.

81486325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259463 (or 3259458 counting only the distinct ones).

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

The square root of 81486325 is about 9026.9776226598. The cubic root of 81486325 is about 433.5390722574.

The spelling of 81486325 in words is "eighty-one million, four hundred eighty-six thousand, three hundred twenty-five".