138550031 has 8 divisors (see below), whose sum is σ = 141994944. Its totient is φ = 135125920.

The previous prime is 138550019. The next prime is 138550103. The reversal of 138550031 is 130055831.

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 138550031 - 2⁶ = 138549967 is a prime.

It is a super-2 number, since 2×138550031² = 38392222180201922, which 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 (138550331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8741 + ... + 18801.

It is an arithmetic number, because the mean of its divisors is an integer number (17749368).

Almost surely, 2^138550031 is an apocalyptic number.

138550031 is a deficient number, since it is larger than the sum of its proper divisors (3444913).

138550031 is a wasteful number, since it uses less digits than its factorization.

138550031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10401.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 138550031 is about 11770.7277175203. The cubic root of 138550031 is about 517.4505772463.

The spelling of 138550031 in words is "one hundred thirty-eight million, five hundred fifty thousand, thirty-one".