39216081 has 8 divisors (see below), whose sum is σ = 54561600. Its totient is φ = 25007312.

The previous prime is 39216053. The next prime is 39216097. The reversal of 39216081 is 18061293.

39216081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 39216081 - 2⁶ = 39216017 is a prime.

It is a super-2 number, since 2×39216081² = 3075802017997122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39216011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284106 + ... + 284243.

It is an arithmetic number, because the mean of its divisors is an integer number (6820200).

Almost surely, 2^39216081 is an apocalyptic number.

It is an amenable number.

39216081 is a deficient number, since it is larger than the sum of its proper divisors (15345519).

39216081 is a wasteful number, since it uses less digits than its factorization.

39216081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568375.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 39216081 is about 6262.2744270752. The cubic root of 39216081 is about 339.7462957415.

The spelling of 39216081 in words is "thirty-nine million, two hundred sixteen thousand, eighty-one".