138244442831 has 8 divisors (see below), whose sum is σ = 153063047424. Its totient is φ = 123800992920.

The previous prime is 138244442813. The next prime is 138244442893.

138244442831 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 138244442831 - 2¹⁴ = 138244426447 is a prime.

It is a super-2 number, since 2×138244442831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138244445831) 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, 93787895 + ... + 93789368.

It is an arithmetic number, because the mean of its divisors is an integer number (19132880928).

Almost surely, 2^138244442831 is an apocalyptic number.

138244442831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138244442831 is a deficient number, since it is larger than the sum of its proper divisors (14818604593).

138244442831 is a wasteful number, since it uses less digits than its factorization.

138244442831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187577341.

The product of its digits is 589824, while the sum is 44.

The spelling of 138244442831 in words is "one hundred thirty-eight billion, two hundred forty-four million, four hundred forty-two thousand, eight hundred thirty-one".