10431221 has 4 divisors (see below), whose sum is σ = 10767744. Its totient is φ = 10094700.

The previous prime is 10431199. The next prime is 10431229. The reversal of 10431221 is 12213401.

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 10431221 - 2²² = 6236917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10431196 and 10431205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10431229) 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, 168215 + ... + 168276.

It is an arithmetic number, because the mean of its divisors is an integer number (2691936).

Almost surely, 2^10431221 is an apocalyptic number.

It is an amenable number.

10431221 is a deficient number, since it is larger than the sum of its proper divisors (336523).

10431221 is an equidigital number, since it uses as much as digits as its factorization.

10431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336522.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 10431221 is about 3229.7400824215. The cubic root of 10431221 is about 218.4967838984.

Adding to 10431221 its reverse (12213401), we get a palindrome (22644622).

The spelling of 10431221 in words is "ten million, four hundred thirty-one thousand, two hundred twenty-one".