81152306 has 16 divisors (see below), whose sum is σ = 129276000. Its totient is φ = 38098368.

The previous prime is 81152293. The next prime is 81152311. The reversal of 81152306 is 60325118.

It is a super-3 number, since 3×81152306³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

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, 5156 + ... + 13743.

It is an arithmetic number, because the mean of its divisors is an integer number (8079750).

Almost surely, 2^81152306 is an apocalyptic number.

81152306 is a deficient number, since it is larger than the sum of its proper divisors (48123694).

81152306 is a wasteful number, since it uses less digits than its factorization.

81152306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19033.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 81152306 is about 9008.4574706217. The cubic root of 81152306 is about 432.9458905090.

The spelling of 81152306 in words is "eighty-one million, one hundred fifty-two thousand, three hundred six".