139808225 has 12 divisors (see below), whose sum is σ = 174405504. Its totient is φ = 111173520.

The previous prime is 139808219. The next prime is 139808239. The reversal of 139808225 is 522808931.

It is not a de Polignac number, because 139808225 - 2⁶ = 139808161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12569 + ... + 20918.

It is an arithmetic number, because the mean of its divisors is an integer number (14533792).

Almost surely, 2^139808225 is an apocalyptic number.

It is an amenable number.

139808225 is a deficient number, since it is larger than the sum of its proper divisors (34597279).

139808225 is a wasteful number, since it uses less digits than its factorization.

139808225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33664 (or 33659 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 139808225 is about 11824.0528161879. The cubic root of 139808225 is about 519.0122088547.

The spelling of 139808225 in words is "one hundred thirty-nine million, eight hundred eight thousand, two hundred twenty-five".