31332005 has 16 divisors (see below), whose sum is σ = 38329200. Its totient is φ = 24583680.

The previous prime is 31332001. The next prime is 31332011. The reversal of 31332005 is 50023313.

It can be written as a sum of positive squares in 8 ways, for example, as 13498276 + 17833729 = 3674^2 + 4223^2 .

It is not a de Polignac number, because 31332005 - 2² = 31332001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31332001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80351 + ... + 80739.

It is an arithmetic number, because the mean of its divisors is an integer number (2395575).

Almost surely, 2^31332005 is an apocalyptic number.

It is an amenable number.

31332005 is a deficient number, since it is larger than the sum of its proper divisors (6997195).

31332005 is a wasteful number, since it uses less digits than its factorization.

31332005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 31332005 is about 5597.4998883430. The cubic root of 31332005 is about 315.2555413572.

Adding to 31332005 its reverse (50023313), we get a palindrome (81355318).

The spelling of 31332005 in words is "thirty-one million, three hundred thirty-two thousand, five".