429235221 has 4 divisors (see below), whose sum is σ = 572313632. Its totient is φ = 286156812.

The previous prime is 429235217. The next prime is 429235231. The reversal of 429235221 is 122532924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 429235221 - 2² = 429235217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (429235231) 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, 71539201 + ... + 71539206.

It is an arithmetic number, because the mean of its divisors is an integer number (143078408).

Almost surely, 2^429235221 is an apocalyptic number.

It is an amenable number.

429235221 is a deficient number, since it is larger than the sum of its proper divisors (143078411).

429235221 is a wasteful number, since it uses less digits than its factorization.

429235221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143078410.

The product of its digits is 8640, while the sum is 30.

The square root of 429235221 is about 20717.9926875168. The cubic root of 429235221 is about 754.3364905854.

The spelling of 429235221 in words is "four hundred twenty-nine million, two hundred thirty-five thousand, two hundred twenty-one".