30055139 has 2 divisors, whose sum is σ = 30055140. Its totient is φ = 30055138.

The previous prime is 30055111. The next prime is 30055147. The reversal of 30055139 is 93155003.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30055139 is a prime.

It is a super-2 number, since 2×30055139² = 1806622760618642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30058139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15027569 + 15027570.

It is an arithmetic number, because the mean of its divisors is an integer number (15027570).

Almost surely, 2^30055139 is an apocalyptic number.

30055139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30055139 is an equidigital number, since it uses as much as digits as its factorization.

30055139 is an evil number, because the sum of its binary digits is even.

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

The square root of 30055139 is about 5482.2567433494. The cubic root of 30055139 is about 310.9135004111.

The spelling of 30055139 in words is "thirty million, fifty-five thousand, one hundred thirty-nine".