81695295 has 24 divisors (see below), whose sum is σ = 154479312. Its totient is φ = 39609600.

The previous prime is 81695293. The next prime is 81695303. The reversal of 81695295 is 59259618.

It is not a de Polignac number, because 81695295 - 2¹ = 81695293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 81695295.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81695293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82026 + ... + 83015.

It is an arithmetic number, because the mean of its divisors is an integer number (6436638).

Almost surely, 2^81695295 is an apocalyptic number.

81695295 is a deficient number, since it is larger than the sum of its proper divisors (72784017).

81695295 is a wasteful number, since it uses less digits than its factorization.

81695295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165063 (or 165060 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 81695295 is about 9038.5449603352. The cubic root of 81695295 is about 433.9093565787.

The spelling of 81695295 in words is "eighty-one million, six hundred ninety-five thousand, two hundred ninety-five".