424634221 has 4 divisors (see below), whose sum is σ = 463237344. Its totient is φ = 386031100.

The previous prime is 424634213. The next prime is 424634239. The reversal of 424634221 is 122436424.

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 a cyclic number.

It is not a de Polignac number, because 424634221 - 2³ = 424634213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 424634221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424634201) 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, 19301545 + ... + 19301566.

It is an arithmetic number, because the mean of its divisors is an integer number (115809336).

Almost surely, 2^424634221 is an apocalyptic number.

It is an amenable number.

424634221 is a deficient number, since it is larger than the sum of its proper divisors (38603123).

424634221 is a wasteful number, since it uses less digits than its factorization.

424634221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38603122.

The product of its digits is 9216, while the sum is 28.

The square root of 424634221 is about 20606.6547746110. The cubic root of 424634221 is about 751.6315421127.

The spelling of 424634221 in words is "four hundred twenty-four million, six hundred thirty-four thousand, two hundred twenty-one".