421990223 has 8 divisors (see below), whose sum is σ = 455522400. Its totient is φ = 389723488.

The previous prime is 421990213. The next prime is 421990229. The reversal of 421990223 is 322099124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421990223 - 2¹⁰ = 421989199 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 421990223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421990229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315668 + ... + 317001.

It is an arithmetic number, because the mean of its divisors is an integer number (56940300).

Almost surely, 2^421990223 is an apocalyptic number.

421990223 is a deficient number, since it is larger than the sum of its proper divisors (33532177).

421990223 is a wasteful number, since it uses less digits than its factorization.

421990223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632721.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 421990223 is about 20542.4006143391. The cubic root of 421990223 is about 750.0682740810.

The spelling of 421990223 in words is "four hundred twenty-one million, nine hundred ninety thousand, two hundred twenty-three".