138255051 has 32 divisors (see below), whose sum is σ = 207936000. Its totient is φ = 80974080.

The previous prime is 138255049. The next prime is 138255079. The reversal of 138255051 is 150552831.

It is not a de Polignac number, because 138255051 - 2¹ = 138255049 is a prime.

It is a super-2 number, since 2×138255051² = 38228918254025202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138255011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242695 + ... + 243263.

It is an arithmetic number, because the mean of its divisors is an integer number (6498000).

Almost surely, 2^138255051 is an apocalyptic number.

138255051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138255051 is a deficient number, since it is larger than the sum of its proper divisors (69680949).

138255051 is a wasteful number, since it uses less digits than its factorization.

138255051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 138255051 is about 11758.1908047114. The cubic root of 138255051 is about 517.0830902024.

The spelling of 138255051 in words is "one hundred thirty-eight million, two hundred fifty-five thousand, fifty-one".