81486535 has 16 divisors (see below), whose sum is σ = 110849760. Its totient is φ = 57006720.

The previous prime is 81486529. The next prime is 81486541. The reversal of 81486535 is 53568418.

It is an interprime number because it is at equal distance from previous prime (81486529) and next prime (81486541).

It is not a de Polignac number, because 81486535 - 2³ = 81486527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31756 + ... + 34225.

It is an arithmetic number, because the mean of its divisors is an integer number (6928110).

Almost surely, 2^81486535 is an apocalyptic number.

81486535 is a deficient number, since it is larger than the sum of its proper divisors (29363225).

81486535 is a wasteful number, since it uses less digits than its factorization.

81486535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66018.

The product of its digits is 115200, while the sum is 40.

The square root of 81486535 is about 9026.9892544525. The cubic root of 81486535 is about 433.5394446844.

The spelling of 81486535 in words is "eighty-one million, four hundred eighty-six thousand, five hundred thirty-five".