31344213 has 8 divisors (see below), whose sum is σ = 42811776. Its totient is φ = 20386400.

The previous prime is 31344197. The next prime is 31344221. The reversal of 31344213 is 31244313.

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 31344213 - 2⁴ = 31344197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31344213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31344223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127293 + ... + 127538.

It is an arithmetic number, because the mean of its divisors is an integer number (5351472).

Almost surely, 2^31344213 is an apocalyptic number.

It is an amenable number.

31344213 is a deficient number, since it is larger than the sum of its proper divisors (11467563).

31344213 is a wasteful number, since it uses less digits than its factorization.

31344213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254875.

The product of its digits is 864, while the sum is 21.

The square root of 31344213 is about 5598.5902689874. The cubic root of 31344213 is about 315.2964807513.

Adding to 31344213 its reverse (31244313), we get a palindrome (62588526).

The spelling of 31344213 in words is "thirty-one million, three hundred forty-four thousand, two hundred thirteen".