30812105 has 8 divisors (see below), whose sum is σ = 37266432. Its totient is φ = 24455088.

The previous prime is 30812099. The next prime is 30812113. The reversal of 30812105 is 50121803.

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 30812105 - 2⁸ = 30811849 is a prime.

It is a Duffinian 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, 23627 + ... + 24896.

It is an arithmetic number, because the mean of its divisors is an integer number (4658304).

Almost surely, 2^30812105 is an apocalyptic number.

It is an amenable number.

30812105 is a deficient number, since it is larger than the sum of its proper divisors (6454327).

30812105 is a wasteful number, since it uses less digits than its factorization.

30812105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48655.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 30812105 is about 5550.8652478690. The cubic root of 30812105 is about 313.5021015014.

Adding to 30812105 its reverse (50121803), we get a palindrome (80933908).

The spelling of 30812105 in words is "thirty million, eight hundred twelve thousand, one hundred five".