31344013 has 4 divisors (see below), whose sum is σ = 31372128. Its totient is φ = 31315900.

The previous prime is 31344011. The next prime is 31344029. The reversal of 31344013 is 31044313.

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 not a de Polignac number, because 31344013 - 2¹ = 31344011 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 (31344011) 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, 12313 + ... + 14638.

It is an arithmetic number, because the mean of its divisors is an integer number (7843032).

Almost surely, 2^31344013 is an apocalyptic number.

It is an amenable number.

31344013 is a deficient number, since it is larger than the sum of its proper divisors (28115).

31344013 is a wasteful number, since it uses less digits than its factorization.

31344013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28114.

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

The square root of 31344013 is about 5598.5724073196. The cubic root of 31344013 is about 315.2958101392.

Adding to 31344013 its reverse (31044313), we get a palindrome (62388326).

The spelling of 31344013 in words is "thirty-one million, three hundred forty-four thousand, thirteen".