31221341 has 4 divisors (see below), whose sum is σ = 31449372. Its totient is φ = 30993312.

The previous prime is 31221329. The next prime is 31221343. The reversal of 31221341 is 14312213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20025625 + 11195716 = 4475^2 + 3346^2 .

It is a cyclic number.

It is not a de Polignac number, because 31221341 - 2⁶ = 31221277 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 (31221343) 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, 113810 + ... + 114083.

It is an arithmetic number, because the mean of its divisors is an integer number (7862343).

Almost surely, 2^31221341 is an apocalyptic number.

It is an amenable number.

31221341 is a deficient number, since it is larger than the sum of its proper divisors (228031).

31221341 is a wasteful number, since it uses less digits than its factorization.

31221341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228030.

The product of its digits is 144, while the sum is 17.

The square root of 31221341 is about 5587.6060168913. The cubic root of 31221341 is about 314.8839448175.

Adding to 31221341 its reverse (14312213), we get a palindrome (45533554).

The spelling of 31221341 in words is "thirty-one million, two hundred twenty-one thousand, three hundred forty-one".