81487295 has 16 divisors (see below), whose sum is σ = 105446880. Its totient is φ = 60249600.

The previous prime is 81487271. The next prime is 81487349. The reversal of 81487295 is 59278418.

It is not a de Polignac number, because 81487295 - 2²⁰ = 80438719 is a prime.

It is a plaindrome in base 12.

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, 6566 + ... + 14355.

It is an arithmetic number, because the mean of its divisors is an integer number (6590430).

Almost surely, 2^81487295 is an apocalyptic number.

81487295 is a deficient number, since it is larger than the sum of its proper divisors (23959585).

81487295 is a wasteful number, since it uses less digits than its factorization.

81487295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20986.

The product of its digits is 161280, while the sum is 44.

The square root of 81487295 is about 9027.0313503388. The cubic root of 81487295 is about 433.5407925101.

The spelling of 81487295 in words is "eighty-one million, four hundred eighty-seven thousand, two hundred ninety-five".