31028925505 has 4 divisors (see below), whose sum is σ = 37234710612. Its totient is φ = 24823140400.

The previous prime is 31028925503. The next prime is 31028925539. The reversal of 31028925505 is 50552982013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22616550544 + 8412374961 = 150388^2 + 91719^2 .

It is not a de Polignac number, because 31028925505 - 2¹ = 31028925503 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31028925503) 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 3 ways as a sum of consecutive naturals, for example, 3102892546 + ... + 3102892555.

It is an arithmetic number, because the mean of its divisors is an integer number (9308677653).

Almost surely, 2^31028925505 is an apocalyptic number.

It is an amenable number.

31028925505 is a deficient number, since it is larger than the sum of its proper divisors (6205785107).

31028925505 is an equidigital number, since it uses as much as digits as its factorization.

31028925505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6205785106.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 31028925505 in words is "thirty-one billion, twenty-eight million, nine hundred twenty-five thousand, five hundred five".