30808051 has 4 divisors (see below), whose sum is σ = 30820192. Its totient is φ = 30795912.

The previous prime is 30808049. The next prime is 30808091. The reversal of 30808051 is 15080803.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15080803 = 211 ⋅71473.

It is a cyclic number.

It is not a de Polignac number, because 30808051 - 2¹ = 30808049 is a prime.

It is the 5551-st Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30808031) by changing a digit.

It is a nontrivial repunit in base 5550.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651 + ... + 7876.

It is an arithmetic number, because the mean of its divisors is an integer number (7705048).

Almost surely, 2^30808051 is an apocalyptic number.

30808051 is a deficient number, since it is larger than the sum of its proper divisors (12141).

30808051 is an equidigital number, since it uses as much as digits as its factorization.

30808051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12140.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 30808051 is about 5550.5000675615. The cubic root of 30808051 is about 313.4883515670.

Adding to 30808051 its reverse (15080803), we get a palindrome (45888854).

The spelling of 30808051 in words is "thirty million, eight hundred eight thousand, fifty-one".