31423243 has 8 divisors (see below), whose sum is σ = 32525696. Its totient is φ = 30326400.

The previous prime is 31423241. The next prime is 31423253. The reversal of 31423243 is 34232413.

It is a happy number.

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 31423243 - 2¹ = 31423241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31423241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12253 + ... + 14593.

It is an arithmetic number, because the mean of its divisors is an integer number (4065712).

Almost surely, 2^31423243 is an apocalyptic number.

31423243 is a deficient number, since it is larger than the sum of its proper divisors (1102453).

31423243 is a wasteful number, since it uses less digits than its factorization.

31423243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805.

The product of its digits is 1728, while the sum is 22.

The square root of 31423243 is about 5605.6438524045. The cubic root of 31423243 is about 315.5612501773.

Adding to 31423243 its reverse (34232413), we get a palindrome (65655656).

The spelling of 31423243 in words is "thirty-one million, four hundred twenty-three thousand, two hundred forty-three".