138159225 has 18 divisors (see below), whose sum is σ = 247458926. Its totient is φ = 73684800.

The previous prime is 138159211. The next prime is 138159233. The reversal of 138159225 is 522951831.

138159225 is a `hidden beast` number, since 1 + 381 + 59 + 225 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 27657081 + 110502144 = 5259^2 + 10512^2 .

It is not a de Polignac number, because 138159225 - 2⁷ = 138159097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138159225.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 306796 + ... + 307245.

Almost surely, 2^138159225 is an apocalyptic number.

138159225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138159225 is a deficient number, since it is larger than the sum of its proper divisors (109299701).

138159225 is a wasteful number, since it uses less digits than its factorization.

138159225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614057 (or 614049 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 138159225 is about 11754.1152368011. The cubic root of 138159225 is about 516.9635973855.

It can be divided in two parts, 138159 and 225, that added together give a square (138384 = 372²).

The spelling of 138159225 in words is "one hundred thirty-eight million, one hundred fifty-nine thousand, two hundred twenty-five".