424350221 has 4 divisors (see below), whose sum is σ = 431306844. Its totient is φ = 417393600.

The previous prime is 424350203. The next prime is 424350229. The reversal of 424350221 is 122053424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 195160900 + 229189321 = 13970^2 + 15139^2 .

It is a cyclic number.

It is not a de Polignac number, because 424350221 - 2¹⁴ = 424333837 is a prime.

It is a super-2 number, since 2×424350221² = 360146220125497682, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424350229) 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, 3478220 + ... + 3478341.

It is an arithmetic number, because the mean of its divisors is an integer number (107826711).

Almost surely, 2^424350221 is an apocalyptic number.

It is an amenable number.

424350221 is a deficient number, since it is larger than the sum of its proper divisors (6956623).

424350221 is an equidigital number, since it uses as much as digits as its factorization.

424350221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6956622.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 424350221 is about 20599.7626442636. The cubic root of 424350221 is about 751.4639382834.

The spelling of 424350221 in words is "four hundred twenty-four million, three hundred fifty thousand, two hundred twenty-one".