31242423 has 8 divisors (see below), whose sum is σ = 41805936. Its totient is φ = 20753600.

The previous prime is 31242397. The next prime is 31242433. The reversal of 31242423 is 32424213.

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 31242423 - 2¹⁷ = 31111351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31242423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17688 + ... + 19373.

It is an arithmetic number, because the mean of its divisors is an integer number (5225742).

Almost surely, 2^31242423 is an apocalyptic number.

31242423 is a deficient number, since it is larger than the sum of its proper divisors (10563513).

31242423 is a wasteful number, since it uses less digits than its factorization.

31242423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37345.

The product of its digits is 1152, while the sum is 21.

The square root of 31242423 is about 5589.4921951820. The cubic root of 31242423 is about 314.9548032912.

Adding to 31242423 its reverse (32424213), we get a palindrome (63666636).

The spelling of 31242423 in words is "thirty-one million, two hundred forty-two thousand, four hundred twenty-three".