31343424 has 56 divisors (see below), whose sum is σ = 94780608. Its totient is φ = 8954880.

The previous prime is 31343423. The next prime is 31343441. The reversal of 31343424 is 42434313.

31343424 = T₁₂₇ + T₁₂₈ + ... + T₅₇₄.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31343394 and 31343403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10317 + ... + 13004.

Almost surely, 2^31343424 is an apocalyptic number.

It is an amenable number.

31343424 is an abundant number, since it is smaller than the sum of its proper divisors (63437184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31343424 is a wasteful number, since it uses less digits than its factorization.

31343424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23343 (or 23333 counting only the distinct ones).

The product of its digits is 3456, while the sum is 24.

The square root of 31343424 is about 5598.5198043769. The cubic root of 31343424 is about 315.2938351698.

Adding to 31343424 its reverse (42434313), we get a palindrome (73777737).

The spelling of 31343424 in words is "thirty-one million, three hundred forty-three thousand, four hundred twenty-four".