31344613 has 4 divisors (see below), whose sum is σ = 31370220. Its totient is φ = 31319008.

The previous prime is 31344589. The next prime is 31344631. The reversal of 31344613 is 31644313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31644313 = 2281 ⋅13873.

It can be written as a sum of positive squares in 2 ways, for example, as 23493409 + 7851204 = 4847^2 + 2802^2 .

It is a cyclic number.

It is not a de Polignac number, because 31344613 - 2²¹ = 29247461 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 (31344913) 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, 10870 + ... + 13447.

It is an arithmetic number, because the mean of its divisors is an integer number (7842555).

Almost surely, 2^31344613 is an apocalyptic number.

It is an amenable number.

31344613 is a deficient number, since it is larger than the sum of its proper divisors (25607).

31344613 is a wasteful number, since it uses less digits than its factorization.

31344613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25606.

The product of its digits is 2592, while the sum is 25.

The square root of 31344613 is about 5598.6259921520. The cubic root of 31344613 is about 315.2978219671.

Adding to 31344613 its reverse (31644313), we get a palindrome (62988926).

The spelling of 31344613 in words is "thirty-one million, three hundred forty-four thousand, six hundred thirteen".