139255055 has 4 divisors (see below), whose sum is σ = 167106072. Its totient is φ = 111404040.

The previous prime is 139255033. The next prime is 139255057. The reversal of 139255055 is 550552931.

139255055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 139255055 - 2⁶ = 139254991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139255057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13925501 + ... + 13925510.

It is an arithmetic number, because the mean of its divisors is an integer number (41776518).

Almost surely, 2^139255055 is an apocalyptic number.

139255055 is a deficient number, since it is larger than the sum of its proper divisors (27851017).

139255055 is an equidigital number, since it uses as much as digits as its factorization.

139255055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27851016.

The product of its (nonzero) digits is 33750, while the sum is 35.

The square root of 139255055 is about 11800.6379064862. The cubic root of 139255055 is about 518.3267902617.

The spelling of 139255055 in words is "one hundred thirty-nine million, two hundred fifty-five thousand, fifty-five".