138270131 has 4 divisors (see below), whose sum is σ = 138668952. Its totient is φ = 137871312.

The previous prime is 138270109. The next prime is 138270151. The reversal of 138270131 is 131072831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131072831 = 941 ⋅139291.

It is a cyclic number.

It is not a de Polignac number, because 138270131 - 2¹⁰ = 138269107 is a prime.

It is a super-2 number, since 2×138270131² = 38237258253514322, which contains 22 as substring.

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 138270131.

It is not an unprimeable number, because it can be changed into a prime (138270101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198890 + ... + 199583.

It is an arithmetic number, because the mean of its divisors is an integer number (34667238).

Almost surely, 2^138270131 is an apocalyptic number.

138270131 is a deficient number, since it is larger than the sum of its proper divisors (398821).

138270131 is an equidigital number, since it uses as much as digits as its factorization.

138270131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398820.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 138270131 is about 11758.8320423416. The cubic root of 138270131 is about 517.1018895867.

The spelling of 138270131 in words is "one hundred thirty-eight million, two hundred seventy thousand, one hundred thirty-one".