129225222 has 48 divisors (see below), whose sum is σ = 325428480. Its totient is φ = 36293616.

The previous prime is 129225221. The next prime is 129225223. The reversal of 129225222 is 222522921.

It is an interprime number because it is at equal distance from previous prime (129225221) and next prime (129225223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129225221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1258 + ... + 16125.

It is an arithmetic number, because the mean of its divisors is an integer number (6779760).

Almost surely, 2^129225222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129225222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162714240).

129225222 is an abundant number, since it is smaller than the sum of its proper divisors (196203258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129225222 is a wasteful number, since it uses less digits than its factorization.

129225222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17457 (or 17454 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 129225222 is about 11367.7272134759. The cubic root of 129225222 is about 505.5713195548.

The spelling of 129225222 in words is "one hundred twenty-nine million, two hundred twenty-five thousand, two hundred twenty-two".