81151106 has 16 divisors (see below), whose sum is σ = 127994040. Its totient is φ = 38532480.

The previous prime is 81151079. The next prime is 81151111. The reversal of 81151106 is 60115118.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38130625 + 43020481 = 6175^2 + 6559^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7931 + ... + 15006.

Almost surely, 2^81151106 is an apocalyptic number.

81151106 is a deficient number, since it is larger than the sum of its proper divisors (46842934).

81151106 is a wasteful number, since it uses less digits than its factorization.

81151106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23029.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 81151106 is about 9008.3908662979. The cubic root of 81151106 is about 432.9437565066.

The spelling of 81151106 in words is "eighty-one million, one hundred fifty-one thousand, one hundred six".