138255601 has 8 divisors (see below), whose sum is σ = 151177824. Its totient is φ = 125392320.

The previous prime is 138255581. The next prime is 138255617. The reversal of 138255601 is 106552831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138255601 - 2⁷ = 138255473 is a prime.

It is a super-2 number, since 2×138255601² = 38229222415742402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138255671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9751 + ... + 19276.

It is an arithmetic number, because the mean of its divisors is an integer number (18897228).

Almost surely, 2^138255601 is an apocalyptic number.

138255601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

138255601 is a deficient number, since it is larger than the sum of its proper divisors (12922223).

138255601 is a wasteful number, since it uses less digits than its factorization.

138255601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29471.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 138255601 is about 11758.2141926400. The cubic root of 138255601 is about 517.0837758804.

The spelling of 138255601 in words is "one hundred thirty-eight million, two hundred fifty-five thousand, six hundred one".