30881065 has 8 divisors (see below), whose sum is σ = 38668608. Its totient is φ = 23630640.

The previous prime is 30881029. The next prime is 30881069. The reversal of 30881065 is 56018803.

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

It is not a de Polignac number, because 30881065 - 2¹⁵ = 30848297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30881069) 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, 134151 + ... + 134380.

It is an arithmetic number, because the mean of its divisors is an integer number (4833576).

Almost surely, 2^30881065 is an apocalyptic number.

It is an amenable number.

30881065 is a deficient number, since it is larger than the sum of its proper divisors (7787543).

30881065 is a wasteful number, since it uses less digits than its factorization.

30881065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268559.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 30881065 is about 5557.0734204255. The cubic root of 30881065 is about 313.7358083135.

Adding to 30881065 its reverse (56018803), we get a palindrome (86899868).

The spelling of 30881065 in words is "thirty million, eight hundred eighty-one thousand, sixty-five".