138138051 has 8 divisors (see below), whose sum is σ = 184238784. Its totient is φ = 92064680.

The previous prime is 138138043. The next prime is 138138053. The reversal of 138138051 is 150831831.

138138051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138138051 - 2³ = 138138043 is a prime.

It is a super-2 number, since 2×138138051² = 38164242268157202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138138053) 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, 14116 + ... + 21806.

It is an arithmetic number, because the mean of its divisors is an integer number (23029848).

Almost surely, 2^138138051 is an apocalyptic number.

138138051 is a deficient number, since it is larger than the sum of its proper divisors (46100733).

138138051 is an equidigital number, since it uses as much as digits as its factorization.

138138051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13681.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 138138051 is about 11753.2144964686. The cubic root of 138138051 is about 516.9371864420.

Adding to 138138051 its reverse (150831831), we get a palindrome (288969882).

The spelling of 138138051 in words is "one hundred thirty-eight million, one hundred thirty-eight thousand, fifty-one".