31133413 has 4 divisors (see below), whose sum is σ = 31148460. Its totient is φ = 31118368.

The previous prime is 31133321. The next prime is 31133437. The reversal of 31133413 is 31433113.

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 25573249 + 5560164 = 5057^2 + 2358^2 .

It is a cyclic number.

It is not a de Polignac number, because 31133413 - 2¹³ = 31125221 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 (31133483) 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, 3808 + ... + 8761.

It is an arithmetic number, because the mean of its divisors is an integer number (7787115).

Almost surely, 2^31133413 is an apocalyptic number.

It is an amenable number.

31133413 is a deficient number, since it is larger than the sum of its proper divisors (15047).

31133413 is a wasteful number, since it uses less digits than its factorization.

31133413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15046.

The product of its digits is 324, while the sum is 19.

The square root of 31133413 is about 5579.7323412508. The cubic root of 31133413 is about 314.5880665613.

Adding to 31133413 its reverse (31433113), we get a palindrome (62566526).

The spelling of 31133413 in words is "thirty-one million, one hundred thirty-three thousand, four hundred thirteen".