31725 has 24 divisors (see below), whose sum is σ = 59520. Its totient is φ = 16560.

The previous prime is 31723. The next prime is 31727. The reversal of 31725 is 52713.

31725 is nontrivially palindromic in base 4.

31725 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (31723) and next prime (31727).

It is not a de Polignac number, because 31725 - 2¹ = 31723 is a prime.

31725 is a Rhonda number in base 14.

31725 is strictly pandigital in base 6.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 31698 and 31707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 652 + ... + 698.

It is an arithmetic number, because the mean of its divisors is an integer number (2480).

2³¹⁷²⁵ is an apocalyptic number.

It is an amenable number.

31725 is a deficient number, since it is larger than the sum of its proper divisors (27795).

31725 is a wasteful number, since it uses less digits than its factorization.

31725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 55 counting only the distinct ones).

The product of its digits is 210, while the sum is 18.

The square root of 31725 is about 178.1151313056. The cubic root of 31725 is about 31.6568144174.

It can be divided in two parts, 3 and 1725, that added together give a cube (1728 = 12³).

The spelling of 31725 in words is "thirty-one thousand, seven hundred twenty-five".