139231219 has 8 divisors (see below), whose sum is σ = 141808880. Its totient is φ = 136663200.

The previous prime is 139231187. The next prime is 139231223. The reversal of 139231219 is 912132931.

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

It is a cyclic number.

It is not a de Polignac number, because 139231219 - 2⁵ = 139231187 is a prime.

It is a super-2 number, since 2×139231219² = 38770664688451922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139231019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30892 + ... + 35110.

It is an arithmetic number, because the mean of its divisors is an integer number (17726110).

Almost surely, 2^139231219 is an apocalyptic number.

139231219 is a deficient number, since it is larger than the sum of its proper divisors (2577661).

139231219 is an equidigital number, since it uses as much as digits as its factorization.

139231219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821.

The product of its digits is 2916, while the sum is 31.

The square root of 139231219 is about 11799.6279178625. The cubic root of 139231219 is about 518.2972149323.

The spelling of 139231219 in words is "one hundred thirty-nine million, two hundred thirty-one thousand, two hundred nineteen".