31234013 has 8 divisors (see below), whose sum is σ = 32348376. Its totient is φ = 30139200.

The previous prime is 31234009. The next prime is 31234061. The reversal of 31234013 is 31043213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1006009 + 30228004 = 1003^2 + 5498^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31234013 - 2² = 31234009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31233982 and 31234000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1598 + ... + 8063.

It is an arithmetic number, because the mean of its divisors is an integer number (4043547).

Almost surely, 2^31234013 is an apocalyptic number.

It is an amenable number.

31234013 is a deficient number, since it is larger than the sum of its proper divisors (1114363).

31234013 is an equidigital number, since it uses as much as digits as its factorization.

31234013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9775.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 31234013 is about 5588.7398400713. The cubic root of 31234013 is about 314.9265403574.

Adding to 31234013 its reverse (31043213), we get a palindrome (62277226).

The spelling of 31234013 in words is "thirty-one million, two hundred thirty-four thousand, thirteen".