138031222 has 8 divisors (see below), whose sum is σ = 236624976. Its totient is φ = 59156232.

The previous prime is 138031217. The next prime is 138031277. The reversal of 138031222 is 222130831.

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

It is a junction number, because it is equal to n+sod(n) for n = 138031193 and 138031202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4929673 + ... + 4929700.

It is an arithmetic number, because the mean of its divisors is an integer number (29578122).

Almost surely, 2^138031222 is an apocalyptic number.

138031222 is a deficient number, since it is larger than the sum of its proper divisors (98593754).

138031222 is an equidigital number, since it uses as much as digits as its factorization.

138031222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9859382.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 138031222 is about 11748.6689458849. The cubic root of 138031222 is about 516.8038943616.

The spelling of 138031222 in words is "one hundred thirty-eight million, thirty-one thousand, two hundred twenty-two".