138173000131 has 4 divisors (see below), whose sum is σ = 139088053264. Its totient is φ = 137257947000.

The previous prime is 138173000087. The next prime is 138173000137. The reversal of 138173000131 is 131000371831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138173000131 - 2¹³ = 138172991939 is a prime.

It is a super-2 number, since 2×138173000131² (a number of 23 digits) 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 138173000131.

It is not an unprimeable number, because it can be changed into a prime (138173000137) 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, 457526340 + ... + 457526641.

It is an arithmetic number, because the mean of its divisors is an integer number (34772013316).

Almost surely, 2^138173000131 is an apocalyptic number.

138173000131 is the 214611-st hex number.

138173000131 is a deficient number, since it is larger than the sum of its proper divisors (915053133).

138173000131 is an equidigital number, since it uses as much as digits as its factorization.

138173000131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915053132.

The product of its (nonzero) digits is 1512, while the sum is 28.

Adding to 138173000131 its reverse (131000371831), we get a palindrome (269173371962).

The spelling of 138173000131 in words is "one hundred thirty-eight billion, one hundred seventy-three million, one hundred thirty-one", and thus it is an aban number.