5431221 has 12 divisors (see below), whose sum is σ = 7963072. Its totient is φ = 3566376.

The previous prime is 5431219. The next prime is 5431241. The reversal of 5431221 is 1221345.

5431221 is a `hidden beast` number, since 543 + 122 + 1 = 666.

It is not a de Polignac number, because 5431221 - 2¹ = 5431219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5431194 and 5431203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5431241) 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, 3901 + ... + 5106.

Almost surely, 2^5431221 is an apocalyptic number.

It is an amenable number.

5431221 is a deficient number, since it is larger than the sum of its proper divisors (2531851).

5431221 is a wasteful number, since it uses less digits than its factorization.

5431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9080 (or 9077 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 5431221 is about 2330.4980154465. The cubic root of 5431221 is about 175.7785286749.

Adding to 5431221 its reverse (1221345), we get a palindrome (6652566).

It can be divided in two parts, 543 and 1221, that added together give a square (1764 = 42²).

The spelling of 5431221 in words is "five million, four hundred thirty-one thousand, two hundred twenty-one".