129223522 has 16 divisors (see below), whose sum is σ = 212909760. Its totient is φ = 58549392.

The previous prime is 129223519. The next prime is 129223553. The reversal of 129223522 is 225322921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73053 + ... + 74800.

It is an arithmetic number, because the mean of its divisors is an integer number (13306860).

Almost surely, 2^129223522 is an apocalyptic number.

129223522 is a deficient number, since it is larger than the sum of its proper divisors (83686238).

129223522 is a wasteful number, since it uses less digits than its factorization.

129223522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147897.

The product of its digits is 4320, while the sum is 28.

The square root of 129223522 is about 11367.6524401479. The cubic root of 129223522 is about 505.5691025598.

The spelling of 129223522 in words is "one hundred twenty-nine million, two hundred twenty-three thousand, five hundred twenty-two".