133448219 has 4 divisors (see below), whose sum is σ = 133833144. Its totient is φ = 133063296.

The previous prime is 133448137. The next prime is 133448243. The reversal of 133448219 is 912844331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133448219 - 2²⁴ = 116671003 is a prime.

It is a super-2 number, since 2×133448219² = 35616854308543922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133441219) 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, 191942 + ... + 192635.

It is an arithmetic number, because the mean of its divisors is an integer number (33458286).

Almost surely, 2^133448219 is an apocalyptic number.

133448219 is a deficient number, since it is larger than the sum of its proper divisors (384925).

133448219 is an equidigital number, since it uses as much as digits as its factorization.

133448219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384924.

The product of its digits is 20736, while the sum is 35.

The square root of 133448219 is about 11551.9790079449. The cubic root of 133448219 is about 511.0196427563.

The spelling of 133448219 in words is "one hundred thirty-three million, four hundred forty-eight thousand, two hundred nineteen".