31723485 has 16 divisors (see below), whose sum is σ = 51252864. Its totient is φ = 16754112.

The previous prime is 31723481. The next prime is 31723493. The reversal of 31723485 is 58432713.

It is not a de Polignac number, because 31723485 - 2² = 31723481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31723481) 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, 8722 + ... + 11811.

It is an arithmetic number, because the mean of its divisors is an integer number (3203304).

Almost surely, 2^31723485 is an apocalyptic number.

It is an amenable number.

31723485 is a deficient number, since it is larger than the sum of its proper divisors (19529379).

31723485 is a wasteful number, since it uses less digits than its factorization.

31723485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20644.

The product of its digits is 20160, while the sum is 33.

The square root of 31723485 is about 5632.3605175805. The cubic root of 31723485 is about 316.5631049471.

The spelling of 31723485 in words is "thirty-one million, seven hundred twenty-three thousand, four hundred eighty-five".