31224241 has 4 divisors (see below), whose sum is σ = 31236592. Its totient is φ = 31211892.

The previous prime is 31224229. The next prime is 31224269. The reversal of 31224241 is 14242213.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14242213 = 53 ⋅268721.

It is a cyclic number.

It is not a de Polignac number, because 31224241 - 2⁵ = 31224209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31224341) 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, 855 + ... + 7948.

It is an arithmetic number, because the mean of its divisors is an integer number (7809148).

Almost surely, 2^31224241 is an apocalyptic number.

It is an amenable number.

31224241 is a deficient number, since it is larger than the sum of its proper divisors (12351).

31224241 is an equidigital number, since it uses as much as digits as its factorization.

31224241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12350.

The product of its digits is 384, while the sum is 19.

The square root of 31224241 is about 5587.8655137718. The cubic root of 31224241 is about 314.8936938667.

Adding to 31224241 its reverse (14242213), we get a palindrome (45466454).

The spelling of 31224241 in words is "thirty-one million, two hundred twenty-four thousand, two hundred forty-one".