138271556 has 24 divisors (see below), whose sum is σ = 247852416. Its totient is φ = 67465440.

The previous prime is 138271547. The next prime is 138271571. The reversal of 138271556 is 655172831.

138271556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138271556² = 38238046397322272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78275 + ... + 80021.

It is an arithmetic number, because the mean of its divisors is an integer number (10327184).

Almost surely, 2^138271556 is an apocalyptic number.

It is an amenable number.

138271556 is a deficient number, since it is larger than the sum of its proper divisors (109580860).

138271556 is a wasteful number, since it uses less digits than its factorization.

138271556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219 (or 2217 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The square root of 138271556 is about 11758.8926349380. The cubic root of 138271556 is about 517.1036659831.

The spelling of 138271556 in words is "one hundred thirty-eight million, two hundred seventy-one thousand, five hundred fifty-six".