30055931 has 2 divisors, whose sum is σ = 30055932. Its totient is φ = 30055930.

The previous prime is 30055913. The next prime is 30055943. The reversal of 30055931 is 13955003.

Together with previous prime (30055913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30055931 - 2⁶ = 30055867 is a prime.

It is a super-2 number, since 2×30055931² = 1806717976553522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30055931.

It is not a weakly prime, because it can be changed into another prime (30055901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15027965 + 15027966.

It is an arithmetic number, because the mean of its divisors is an integer number (15027966).

Almost surely, 2^30055931 is an apocalyptic number.

30055931 is a deficient number, since it is larger than the sum of its proper divisors (1).

30055931 is an equidigital number, since it uses as much as digits as its factorization.

30055931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2025, while the sum is 26.

The square root of 30055931 is about 5482.3289759007. The cubic root of 30055931 is about 310.9162314064.

The spelling of 30055931 in words is "thirty million, fifty-five thousand, nine hundred thirty-one".