421344433 has 4 divisors (see below), whose sum is σ = 421707888. Its totient is φ = 420980980.

The previous prime is 421344421. The next prime is 421344449. The reversal of 421344433 is 334443124.

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 421344433 - 2²¹ = 419247281 is a prime.

It is a super-2 number, since 2×421344433² = 355062262440182978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421344463) 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, 179983 + ... + 182308.

It is an arithmetic number, because the mean of its divisors is an integer number (105426972).

Almost surely, 2^421344433 is an apocalyptic number.

It is an amenable number.

421344433 is a deficient number, since it is larger than the sum of its proper divisors (363455).

421344433 is a wasteful number, since it uses less digits than its factorization.

421344433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363454.

The product of its digits is 13824, while the sum is 28.

The square root of 421344433 is about 20526.6761313175. The cubic root of 421344433 is about 749.6854580288.

Adding to 421344433 its reverse (334443124), we get a palindrome (755787557).

The spelling of 421344433 in words is "four hundred twenty-one million, three hundred forty-four thousand, four hundred thirty-three".