138557051 has 8 divisors (see below), whose sum is σ = 141959664. Its totient is φ = 135162720.

The previous prime is 138557039. The next prime is 138557071. The reversal of 138557051 is 150755831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138557051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138557071) 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 7 ways as a sum of consecutive naturals, for example, 44105 + ... + 47141.

It is an arithmetic number, because the mean of its divisors is an integer number (17744958).

Almost surely, 2^138557051 is an apocalyptic number.

138557051 is a deficient number, since it is larger than the sum of its proper divisors (3402613).

138557051 is a wasteful number, since it uses less digits than its factorization.

138557051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141.

The product of its (nonzero) digits is 21000, while the sum is 35.

The square root of 138557051 is about 11771.0259111090. The cubic root of 138557051 is about 517.4593164280.

The spelling of 138557051 in words is "one hundred thirty-eight million, five hundred fifty-seven thousand, fifty-one".