138227461131 has 16 divisors (see below), whose sum is σ = 188810945568. Its totient is φ = 89898105600.

The previous prime is 138227461123. The next prime is 138227461187. The reversal of 138227461131 is 131164722831.

It is not a de Polignac number, because 138227461131 - 2³ = 138227461123 is a prime.

It is a super-2 number, since 2×138227461131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138227461131.

It is not an unprimeable number, because it can be changed into a prime (138227461231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2583705 + ... + 2636661.

It is an arithmetic number, because the mean of its divisors is an integer number (11800684098).

Almost surely, 2^138227461131 is an apocalyptic number.

138227461131 is a deficient number, since it is larger than the sum of its proper divisors (50583484437).

138227461131 is a wasteful number, since it uses less digits than its factorization.

138227461131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74222.

The product of its digits is 48384, while the sum is 39.

The spelling of 138227461131 in words is "one hundred thirty-eight billion, two hundred twenty-seven million, four hundred sixty-one thousand, one hundred thirty-one".