424365221 has 4 divisors (see below), whose sum is σ = 484988832. Its totient is φ = 363741612.

The previous prime is 424365217. The next prime is 424365239. The reversal of 424365221 is 122563424.

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 424365221 - 2² = 424365217 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 (424365251) 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, 30311795 + ... + 30311808.

It is an arithmetic number, because the mean of its divisors is an integer number (121247208).

Almost surely, 2^424365221 is an apocalyptic number.

It is an amenable number.

424365221 is a deficient number, since it is larger than the sum of its proper divisors (60623611).

424365221 is an equidigital number, since it uses as much as digits as its factorization.

424365221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60623610.

The product of its digits is 11520, while the sum is 29.

The square root of 424365221 is about 20600.1267229112. The cubic root of 424365221 is about 751.4727924685.

The spelling of 424365221 in words is "four hundred twenty-four million, three hundred sixty-five thousand, two hundred twenty-one".