109431219 has 4 divisors (see below), whose sum is σ = 145908296. Its totient is φ = 72954144.

The previous prime is 109431211. The next prime is 109431221. The reversal of 109431219 is 912134901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912134901 = 3 ⋅304044967.

It is not a de Polignac number, because 109431219 - 2³ = 109431211 is a prime.

It is a super-2 number, since 2×109431219² = 23950383383651922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109431211) 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, 18238534 + ... + 18238539.

It is an arithmetic number, because the mean of its divisors is an integer number (36477074).

Almost surely, 2^109431219 is an apocalyptic number.

109431219 is a deficient number, since it is larger than the sum of its proper divisors (36477077).

109431219 is an equidigital number, since it uses as much as digits as its factorization.

109431219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36477076.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 109431219 is about 10460.9377686706. The cubic root of 109431219 is about 478.3147192418.

The spelling of 109431219 in words is "one hundred nine million, four hundred thirty-one thousand, two hundred nineteen".