146216581 has 8 divisors (see below), whose sum is σ = 167187200. Its totient is φ = 125266608.

The previous prime is 146216557. The next prime is 146216593. The reversal of 146216581 is 185612641.

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 146216581 - 2⁹ = 146216069 is a prime.

It is a super-2 number, since 2×146216581² = 42758577118659122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146214581) 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, 15595 + ... + 23143.

It is an arithmetic number, because the mean of its divisors is an integer number (20898400).

Almost surely, 2^146216581 is an apocalyptic number.

It is an amenable number.

146216581 is a deficient number, since it is larger than the sum of its proper divisors (20970619).

146216581 is an equidigital number, since it uses as much as digits as its factorization.

146216581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10323.

The product of its digits is 11520, while the sum is 34.

The square root of 146216581 is about 12092.0048379084. The cubic root of 146216581 is about 526.8239879231.

The spelling of 146216581 in words is "one hundred forty-six million, two hundred sixteen thousand, five hundred eighty-one".