403223121 has 12 divisors (see below), whose sum is σ = 665638272. Its totient is φ = 230413176.

The previous prime is 403223087. The next prime is 403223123. The reversal of 403223121 is 121322304.

It is not a de Polignac number, because 403223121 - 2¹⁰ = 403222097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 403223094 and 403223103.

It is not an unprimeable number, because it can be changed into a prime (403223123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3200121 + ... + 3200246.

It is an arithmetic number, because the mean of its divisors is an integer number (55469856).

Almost surely, 2^403223121 is an apocalyptic number.

It is an amenable number.

403223121 is a deficient number, since it is larger than the sum of its proper divisors (262415151).

403223121 is a wasteful number, since it uses less digits than its factorization.

403223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6400380 (or 6400377 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 403223121 is about 20080.4163552452. The cubic root of 403223121 is about 738.7800211116.

Adding to 403223121 its reverse (121322304), we get a palindrome (524545425).

The spelling of 403223121 in words is "four hundred three million, two hundred twenty-three thousand, one hundred twenty-one".