31631242243 has 8 divisors (see below), whose sum is σ = 33534081920. Its totient is φ = 29783557440.

The previous prime is 31631242207. The next prime is 31631242277. The reversal of 31631242243 is 34224213613.

It is a happy number.

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 31631242243 - 2⁹ = 31631241731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31631242543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13787538 + ... + 13789831.

It is an arithmetic number, because the mean of its divisors is an integer number (4191760240).

Almost surely, 2^31631242243 is an apocalyptic number.

31631242243 is a deficient number, since it is larger than the sum of its proper divisors (1902839677).

31631242243 is a wasteful number, since it uses less digits than its factorization.

31631242243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27577437.

The product of its digits is 20736, while the sum is 31.

Adding to 31631242243 its reverse (34224213613), we get a palindrome (65855455856).

The spelling of 31631242243 in words is "thirty-one billion, six hundred thirty-one million, two hundred forty-two thousand, two hundred forty-three".