55125139 has 2 divisors, whose sum is σ = 55125140. Its totient is φ = 55125138.

The previous prime is 55125113. The next prime is 55125157. The reversal of 55125139 is 93152155.

55125139 is nontrivially palindromic in base 8.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55125139 - 2⁹ = 55124627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55125139.

It is not a weakly prime, because it can be changed into another prime (55125199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27562569 + 27562570.

It is an arithmetic number, because the mean of its divisors is an integer number (27562570).

Almost surely, 2^55125139 is an apocalyptic number.

55125139 is a deficient number, since it is larger than the sum of its proper divisors (1).

55125139 is an equidigital number, since it uses as much as digits as its factorization.

55125139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6750, while the sum is 31.

The square root of 55125139 is about 7424.6305631998. The cubic root of 55125139 is about 380.5834504362.

The spelling of 55125139 in words is "fifty-five million, one hundred twenty-five thousand, one hundred thirty-nine".