81275058 has 24 divisors (see below), whose sum is σ = 178985196. Its totient is φ = 26647200.

The previous prime is 81275017. The next prime is 81275069. The reversal of 81275058 is 85057218.

It can be written as a sum of positive squares in 2 ways, for example, as 68508729 + 12766329 = 8277^2 + 3573^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35913 + ... + 38108.

Almost surely, 2^81275058 is an apocalyptic number.

81275058 is an abundant number, since it is smaller than the sum of its proper divisors (97710138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81275058 is a wasteful number, since it uses less digits than its factorization.

81275058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74090 (or 74087 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 81275058 is about 9015.2680492595. The cubic root of 81275058 is about 433.1640736724.

The spelling of 81275058 in words is "eighty-one million, two hundred seventy-five thousand, fifty-eight".