138230311 has 6 divisors (see below), whose sum is σ = 141685736. Its totient is φ = 134857200.

The previous prime is 138230297. The next prime is 138230359. The reversal of 138230311 is 113032831.

138230311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138230311 - 2⁹ = 138229799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138230371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39435 + ... + 42796.

Almost surely, 2^138230311 is an apocalyptic number.

138230311 is a deficient number, since it is larger than the sum of its proper divisors (3455425).

138230311 is an frugal number, since it uses more digits than its factorization.

138230311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82313 (or 82272 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 138230311 is about 11757.1387250470. The cubic root of 138230311 is about 517.0522452804.

The spelling of 138230311 in words is "one hundred thirty-eight million, two hundred thirty thousand, three hundred eleven".