30881045 has 8 divisors (see below), whose sum is σ = 39907896. Its totient is φ = 22804416.

The previous prime is 30881029. The next prime is 30881069. The reversal of 30881045 is 54018803.

It can be written as a sum of positive squares in 4 ways, for example, as 167281 + 30713764 = 409^2 + 5542^2 .

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 30881045 - 2⁴ = 30881029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30880999 and 30881017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237482 + ... + 237611.

It is an arithmetic number, because the mean of its divisors is an integer number (4988487).

Almost surely, 2^30881045 is an apocalyptic number.

It is an amenable number.

30881045 is a deficient number, since it is larger than the sum of its proper divisors (9026851).

30881045 is a wasteful number, since it uses less digits than its factorization.

30881045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475111.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 30881045 is about 5557.0716209169. The cubic root of 30881045 is about 313.7357405836.

Adding to 30881045 its reverse (54018803), we get a palindrome (84899848).

The spelling of 30881045 in words is "thirty million, eight hundred eighty-one thousand, forty-five".