81652306 has 8 divisors (see below), whose sum is σ = 122604300. Its totient is φ = 40784208.

The previous prime is 81652273. The next prime is 81652321. The reversal of 81652306 is 60325618.

It can be written as a sum of positive squares in 2 ways, for example, as 79121025 + 2531281 = 8895^2 + 1591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18481 + ... + 22468.

Almost surely, 2^81652306 is an apocalyptic number.

81652306 is a deficient number, since it is larger than the sum of its proper divisors (40951994).

81652306 is a wasteful number, since it uses less digits than its factorization.

81652306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41948.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 81652306 is about 9036.1665544632. The cubic root of 81652306 is about 433.8332338671.

The spelling of 81652306 in words is "eighty-one million, six hundred fifty-two thousand, three hundred six".