31344543 has 16 divisors (see below), whose sum is σ = 47132160. Its totient is φ = 20583288.

The previous prime is 31344527. The next prime is 31344553. The reversal of 31344543 is 34544313.

It is not a de Polignac number, because 31344543 - 2⁴ = 31344527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31344553) 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 15 ways as a sum of consecutive naturals, for example, 6855 + ... + 10472.

It is an arithmetic number, because the mean of its divisors is an integer number (2945760).

Almost surely, 2^31344543 is an apocalyptic number.

31344543 is a deficient number, since it is larger than the sum of its proper divisors (15787617).

31344543 is a wasteful number, since it uses less digits than its factorization.

31344543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17403 (or 17397 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 31344543 is about 5598.6197406146. The cubic root of 31344543 is about 315.2975872551.

Adding to 31344543 its reverse (34544313), we get a palindrome (65888856).

The spelling of 31344543 in words is "thirty-one million, three hundred forty-four thousand, five hundred forty-three".