138227499 has 32 divisors (see below), whose sum is σ = 212791040. Its totient is φ = 88615296.

The previous prime is 138227477. The next prime is 138227503. The reversal of 138227499 is 994722831.

138227499 is a `hidden beast` number, since 138 + 2 + 27 + 499 = 666.

It is not a de Polignac number, because 138227499 - 2¹⁶ = 138161963 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138227099) 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, 76899 + ... + 78675.

It is an arithmetic number, because the mean of its divisors is an integer number (6649720).

Almost surely, 2^138227499 is an apocalyptic number.

138227499 is a deficient number, since it is larger than the sum of its proper divisors (74563541).

138227499 is a wasteful number, since it uses less digits than its factorization.

138227499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896 (or 1890 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 138227499 is about 11757.0191375195. The cubic root of 138227499 is about 517.0487391494.

It can be divided in two parts, 13822 and 7499, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 138227499 in words is "one hundred thirty-eight million, two hundred twenty-seven thousand, four hundred ninety-nine".