201613081 has 8 divisors (see below), whose sum is σ = 213698304. Its totient is φ = 189552960.

The previous prime is 201613073. The next prime is 201613099. The reversal of 201613081 is 180316102.

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 201613081 - 2³ = 201613073 is a prime.

It is a super-2 number, since 2×201613081² = 81295668860625122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201613021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11776 + ... + 23278.

It is an arithmetic number, because the mean of its divisors is an integer number (26712288).

Almost surely, 2^201613081 is an apocalyptic number.

It is an amenable number.

201613081 is a deficient number, since it is larger than the sum of its proper divisors (12085223).

201613081 is a wasteful number, since it uses less digits than its factorization.

201613081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12551.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 201613081 is about 14199.0521162506. The cubic root of 201613081 is about 586.3715654208.

Adding to 201613081 its reverse (180316102), we get a palindrome (381929183).

The spelling of 201613081 in words is "two hundred one million, six hundred thirteen thousand, eighty-one".