139550225 has 6 divisors (see below), whose sum is σ = 173042310. Its totient is φ = 111640160.

The previous prime is 139550209. The next prime is 139550303. The reversal of 139550225 is 522055931.

It can be written as a sum of positive squares in 3 ways, for example, as 25573249 + 113976976 = 5057^2 + 10676^2 .

It is not a de Polignac number, because 139550225 - 2⁴ = 139550209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139550191 and 139550200.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 2790980 + ... + 2791029.

It is an arithmetic number, because the mean of its divisors is an integer number (28840385).

Almost surely, 2^139550225 is an apocalyptic number.

It is an amenable number.

139550225 is a deficient number, since it is larger than the sum of its proper divisors (33492085).

139550225 is an equidigital number, since it uses as much as digits as its factorization.

139550225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5582019 (or 5582014 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 139550225 is about 11813.1378134685. The cubic root of 139550225 is about 518.6927531544.

The spelling of 139550225 in words is "one hundred thirty-nine million, five hundred fifty thousand, two hundred twenty-five".