30481561 has 8 divisors (see below), whose sum is σ = 35208864. Its totient is φ = 26080320.

The previous prime is 30481559. The next prime is 30481579. The reversal of 30481561 is 16518403.

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 30481561 - 2¹ = 30481559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30481531) 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, 81315 + ... + 81688.

It is an arithmetic number, because the mean of its divisors is an integer number (4401108).

Almost surely, 2^30481561 is an apocalyptic number.

It is an amenable number.

30481561 is a deficient number, since it is larger than the sum of its proper divisors (4727303).

30481561 is a wasteful number, since it uses less digits than its factorization.

30481561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163031.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 30481561 is about 5521.0108675858. The cubic root of 30481561 is about 312.3770131506.

Adding to 30481561 its reverse (16518403), we get a palindrome (46999964).

The spelling of 30481561 in words is "thirty million, four hundred eighty-one thousand, five hundred sixty-one".