31043413 has 4 divisors (see below), whose sum is σ = 31060588. Its totient is φ = 31026240.

The previous prime is 31043371. The next prime is 31043417. The reversal of 31043413 is 31434013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31434013 = 13 ⋅2418001.

It can be written as a sum of positive squares in 2 ways, for example, as 11035684 + 20007729 = 3322^2 + 4473^2 .

It is a cyclic number.

It is not a de Polignac number, because 31043413 - 2²¹ = 28946261 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 (31043417) 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, 5508 + ... + 9613.

It is an arithmetic number, because the mean of its divisors is an integer number (7765147).

Almost surely, 2^31043413 is an apocalyptic number.

It is an amenable number.

31043413 is a deficient number, since it is larger than the sum of its proper divisors (17175).

31043413 is a wasteful number, since it uses less digits than its factorization.

31043413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17174.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 31043413 is about 5571.6616013538. The cubic root of 31043413 is about 314.2846385146.

Adding to 31043413 its reverse (31434013), we get a palindrome (62477426).

The spelling of 31043413 in words is "thirty-one million, forty-three thousand, four hundred thirteen".