138190051 has 4 divisors (see below), whose sum is σ = 138634704. Its totient is φ = 137745400.

The previous prime is 138190043. The next prime is 138190067. The reversal of 138190051 is 150091831.

138190051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138190051 - 2³ = 138190043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138190081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221860 + ... + 222481.

It is an arithmetic number, because the mean of its divisors is an integer number (34658676).

Almost surely, 2^138190051 is an apocalyptic number.

138190051 is a deficient number, since it is larger than the sum of its proper divisors (444653).

138190051 is an equidigital number, since it uses as much as digits as its factorization.

138190051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444652.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 138190051 is about 11755.4264490915. The cubic root of 138190051 is about 517.0020427247.

The spelling of 138190051 in words is "one hundred thirty-eight million, one hundred ninety thousand, fifty-one".