138507151 has 4 divisors (see below), whose sum is σ = 139732992. Its totient is φ = 137281312.

The previous prime is 138507139. The next prime is 138507181. The reversal of 138507151 is 151705831.

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 138507151 - 2¹³ = 138498959 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138507121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612751 + ... + 612976.

It is an arithmetic number, because the mean of its divisors is an integer number (34933248).

Almost surely, 2^138507151 is an apocalyptic number.

138507151 is a deficient number, since it is larger than the sum of its proper divisors (1225841).

138507151 is a wasteful number, since it uses less digits than its factorization.

138507151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225840.

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 138507151 is about 11768.9061088956. The cubic root of 138507151 is about 517.3971896240.

The spelling of 138507151 in words is "one hundred thirty-eight million, five hundred seven thousand, one hundred fifty-one".