129225219 has 4 divisors (see below), whose sum is σ = 172300296. Its totient is φ = 86150144.

The previous prime is 129225197. The next prime is 129225221. The reversal of 129225219 is 912522921.

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 129225219 - 2¹³ = 129217027 is a prime.

It is a super-2 number, since 2×129225219² = 33398314451195922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129225219.

It is not an unprimeable number, because it can be changed into a prime (129225919) 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, 21537534 + ... + 21537539.

It is an arithmetic number, because the mean of its divisors is an integer number (43075074).

Almost surely, 2^129225219 is an apocalyptic number.

129225219 is a deficient number, since it is larger than the sum of its proper divisors (43075077).

129225219 is an equidigital number, since it uses as much as digits as its factorization.

129225219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43075076.

The product of its digits is 6480, while the sum is 33.

The square root of 129225219 is about 11367.7270815234. The cubic root of 129225219 is about 505.5713156425.

The spelling of 129225219 in words is "one hundred twenty-nine million, two hundred twenty-five thousand, two hundred nineteen".