129572231 has 8 divisors (see below), whose sum is σ = 132409728. Its totient is φ = 126763000.

The previous prime is 129572221. The next prime is 129572237. The reversal of 129572231 is 132275921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129572231 - 2¹⁰ = 129571207 is a prime.

It is a super-2 number, since 2×129572231² = 33577926092634722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129572237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336 + ... + 16266.

It is an arithmetic number, because the mean of its divisors is an integer number (16551216).

Almost surely, 2^129572231 is an apocalyptic number.

129572231 is a deficient number, since it is larger than the sum of its proper divisors (2837497).

129572231 is a wasteful number, since it uses less digits than its factorization.

129572231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14133.

The product of its digits is 7560, while the sum is 32.

The square root of 129572231 is about 11382.9798822628. The cubic root of 129572231 is about 506.0234526460.

The spelling of 129572231 in words is "one hundred twenty-nine million, five hundred seventy-two thousand, two hundred thirty-one".