81255914 has 16 divisors (see below), whose sum is σ = 123507720. Its totient is φ = 40089600.

The previous prime is 81255901. The next prime is 81255919. The reversal of 81255914 is 41955218.

It can be written as a sum of positive squares in 4 ways, for example, as 51912025 + 29343889 = 7205^2 + 5417^2 .

It is not an unprimeable number, because it can be changed into a prime (81255919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87002 + ... + 87930.

Almost surely, 2^81255914 is an apocalyptic number.

81255914 is a deficient number, since it is larger than the sum of its proper divisors (42251806).

81255914 is a wasteful number, since it uses less digits than its factorization.

81255914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465.

The product of its digits is 14400, while the sum is 35.

The square root of 81255914 is about 9014.2062323867. The cubic root of 81255914 is about 433.1300610064.

The spelling of 81255914 in words is "eighty-one million, two hundred fifty-five thousand, nine hundred fourteen".