31725265 has 16 divisors (see below), whose sum is σ = 44726976. Its totient is φ = 21297600.

The previous prime is 31725263. The next prime is 31725277. The reversal of 31725265 is 56252713.

It is not a de Polignac number, because 31725265 - 2¹ = 31725263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31725263) 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, 21471 + ... + 22900.

It is an arithmetic number, because the mean of its divisors is an integer number (2795436).

Almost surely, 2^31725265 is an apocalyptic number.

It is an amenable number.

31725265 is a deficient number, since it is larger than the sum of its proper divisors (13001711).

31725265 is a wasteful number, since it uses less digits than its factorization.

31725265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44400.

The product of its digits is 12600, while the sum is 31.

The square root of 31725265 is about 5632.5185308173. The cubic root of 31725265 is about 316.5690256059.

Adding to 31725265 its reverse (56252713), we get a palindrome (87977978).

The spelling of 31725265 in words is "thirty-one million, seven hundred twenty-five thousand, two hundred sixty-five".