31424113 has 4 divisors (see below), whose sum is σ = 35913280. Its totient is φ = 26934948.

The previous prime is 31424087. The next prime is 31424117. The reversal of 31424113 is 31142413.

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 a de Polignac number, because none of the positive numbers 2^k-31424113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31424117) 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, 2244573 + ... + 2244586.

It is an arithmetic number, because the mean of its divisors is an integer number (8978320).

Almost surely, 2^31424113 is an apocalyptic number.

It is an amenable number.

31424113 is a deficient number, since it is larger than the sum of its proper divisors (4489167).

31424113 is an equidigital number, since it uses as much as digits as its factorization.

31424113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489166.

The product of its digits is 288, while the sum is 19.

The square root of 31424113 is about 5605.7214522307. The cubic root of 31424113 is about 315.5641624139.

Adding to 31424113 its reverse (31142413), we get a palindrome (62566526).

The spelling of 31424113 in words is "thirty-one million, four hundred twenty-four thousand, one hundred thirteen".