31343556 has 12 divisors (see below), whose sum is σ = 73134992. Its totient is φ = 10447848.

The previous prime is 31343537. The next prime is 31343561. The reversal of 31343556 is 65534313.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305970 + ... + 1305993.

Almost surely, 2^31343556 is an apocalyptic number.

It is an amenable number.

31343556 is an abundant number, since it is smaller than the sum of its proper divisors (41791436).

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

31343556 is a wasteful number, since it uses less digits than its factorization.

31343556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611970 (or 2611968 counting only the distinct ones).

The product of its digits is 16200, while the sum is 30.

The square root of 31343556 is about 5598.5315931948. The cubic root of 31343556 is about 315.2942777797.

Adding to 31343556 its reverse (65534313), we get a palindrome (96877869).

The spelling of 31343556 in words is "thirty-one million, three hundred forty-three thousand, five hundred fifty-six".