31540044005 has 4 divisors (see below), whose sum is σ = 37848052812. Its totient is φ = 25232035200.

The previous prime is 31540043959. The next prime is 31540044017. The reversal of 31540044005 is 50044004513.

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 14523624196 + 17016419809 = 120514^2 + 130447^2 .

It is not a de Polignac number, because 31540044005 - 2²⁰ = 31538995429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3154004396 + ... + 3154004405.

It is an arithmetic number, because the mean of its divisors is an integer number (9462013203).

Almost surely, 2^31540044005 is an apocalyptic number.

It is an amenable number.

31540044005 is a deficient number, since it is larger than the sum of its proper divisors (6308008807).

31540044005 is an equidigital number, since it uses as much as digits as its factorization.

31540044005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308008806.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 31540044005 its reverse (50044004513), we get a palindrome (81584048518).

The spelling of 31540044005 in words is "thirty-one billion, five hundred forty million, forty-four thousand, five".