403223421 has 4 divisors (see below), whose sum is σ = 537631232. Its totient is φ = 268815612.

The previous prime is 403223407. The next prime is 403223449. The reversal of 403223421 is 124322304.

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 not a de Polignac number, because 403223421 - 2⁵ = 403223389 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 (403223461) 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, 67203901 + ... + 67203906.

It is an arithmetic number, because the mean of its divisors is an integer number (134407808).

Almost surely, 2^403223421 is an apocalyptic number.

It is an amenable number.

403223421 is a deficient number, since it is larger than the sum of its proper divisors (134407811).

403223421 is a wasteful number, since it uses less digits than its factorization.

403223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134407810.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 403223421 is about 20080.4238252085. The cubic root of 403223421 is about 738.7802043302.

Adding to 403223421 its reverse (124322304), we get a palindrome (527545725).

The spelling of 403223421 in words is "four hundred three million, two hundred twenty-three thousand, four hundred twenty-one".