31725013 has 8 divisors (see below), whose sum is σ = 32541696. Its totient is φ = 30912000.

The previous prime is 31725011. The next prime is 31725019. The reversal of 31725013 is 31052713.

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 31725013 - 2¹ = 31725011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31725011) by changing a digit.

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, 26988 + ... + 28138.

It is an arithmetic number, because the mean of its divisors is an integer number (4067712).

Almost surely, 2^31725013 is an apocalyptic number.

It is an amenable number.

31725013 is a deficient number, since it is larger than the sum of its proper divisors (816683).

31725013 is a wasteful number, since it uses less digits than its factorization.

31725013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 31725013 is about 5632.4961606733. The cubic root of 31725013 is about 316.5681874137.

Adding to 31725013 its reverse (31052713), we get a palindrome (62777726).

The spelling of 31725013 in words is "thirty-one million, seven hundred twenty-five thousand, thirteen".