30201681 has 8 divisors (see below), whose sum is σ = 40348000. Its totient is φ = 20094912.

The previous prime is 30201671. The next prime is 30201709. The reversal of 30201681 is 18610203.

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

It is not a de Polignac number, because 30201681 - 2⁶ = 30201617 is a prime.

It is a super-2 number, since 2×30201681² = 1824283070451522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30201601) 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, 8056 + ... + 11193.

It is an arithmetic number, because the mean of its divisors is an integer number (5043500).

Almost surely, 2^30201681 is an apocalyptic number.

It is an amenable number.

30201681 is a deficient number, since it is larger than the sum of its proper divisors (10146319).

30201681 is a wasteful number, since it uses less digits than its factorization.

30201681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19775.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 30201681 is about 5495.6056081200. The cubic root of 30201681 is about 311.4179957912.

Adding to 30201681 its reverse (18610203), we get a palindrome (48811884).

The spelling of 30201681 in words is "thirty million, two hundred one thousand, six hundred eighty-one".