81041132 has 12 divisors (see below), whose sum is σ = 141903216. Its totient is φ = 40497360.

The previous prime is 81041131. The next prime is 81041143. The reversal of 81041132 is 23114018.

It is not an unprimeable number, because it can be changed into a prime (81041131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3833 + ... + 13295.

It is an arithmetic number, because the mean of its divisors is an integer number (11825268).

Almost surely, 2^81041132 is an apocalyptic number.

It is an amenable number.

81041132 is a deficient number, since it is larger than the sum of its proper divisors (60862084).

81041132 is a wasteful number, since it uses less digits than its factorization.

81041132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11608 (or 11606 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 81041132 is about 9002.2848210885. The cubic root of 81041132 is about 432.7480964882.

The spelling of 81041132 in words is "eighty-one million, forty-one thousand, one hundred thirty-two".