31100045 has 8 divisors (see below), whose sum is σ = 37432824. Its totient is φ = 24804864.

The previous prime is 31100039. The next prime is 31100063. The reversal of 31100045 is 54000113.

It can be written as a sum of positive squares in 4 ways, for example, as 3200521 + 27899524 = 1789^2 + 5282^2 .

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 31100045 - 2¹² = 31095949 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 7544 + ... + 10913.

It is an arithmetic number, because the mean of its divisors is an integer number (4679103).

Almost surely, 2^31100045 is an apocalyptic number.

It is an amenable number.

31100045 is a deficient number, since it is larger than the sum of its proper divisors (6332779).

31100045 is a wasteful number, since it uses less digits than its factorization.

31100045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18799.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 31100045 is about 5576.7414320551. The cubic root of 31100045 is about 314.4756372233.

Adding to 31100045 its reverse (54000113), we get a palindrome (85100158).

The spelling of 31100045 in words is "thirty-one million, one hundred thousand, forty-five".