31100000445 has 48 divisors (see below), whose sum is σ = 54629031600. Its totient is φ = 16365680640.

The previous prime is 31100000383. The next prime is 31100000471. The reversal of 31100000445 is 54400000113.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 229159044 + 30870841401 = 15138^2 + 175701^2 .

It is not a de Polignac number, because 31100000445 - 2⁶ = 31100000381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1168951 + ... + 1195259.

It is an arithmetic number, because the mean of its divisors is an integer number (1138104825).

Almost surely, 2^31100000445 is an apocalyptic number.

It is an amenable number.

31100000445 is a deficient number, since it is larger than the sum of its proper divisors (23529031155).

31100000445 is a wasteful number, since it uses less digits than its factorization.

31100000445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26670 (or 26667 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 31100000445 its reverse (54400000113), we get a palindrome (85500000558).

The spelling of 31100000445 in words is "thirty-one billion, one hundred million, four hundred forty-five", and thus it is an aban number.