31551112241 has 32 divisors (see below), whose sum is σ = 35674867200. Its totient is φ = 27660631680.

The previous prime is 31551112181. The next prime is 31551112249. The reversal of 31551112241 is 14221115513.

It is a de Polignac number, because none of the positive numbers 2^k-31551112241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31551112241.

It is not an unprimeable number, because it can be changed into a prime (31551112249) 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 31 ways as a sum of consecutive naturals, for example, 7476230 + ... + 7480448.

It is an arithmetic number, because the mean of its divisors is an integer number (1114839600).

Almost surely, 2^31551112241 is an apocalyptic number.

It is an amenable number.

31551112241 is a deficient number, since it is larger than the sum of its proper divisors (4123754959).

31551112241 is a wasteful number, since it uses less digits than its factorization.

31551112241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4509.

The product of its digits is 1200, while the sum is 26.

Adding to 31551112241 its reverse (14221115513), we get a palindrome (45772227754).

The spelling of 31551112241 in words is "thirty-one billion, five hundred fifty-one million, one hundred twelve thousand, two hundred forty-one".