31243413 has 8 divisors (see below), whose sum is σ = 42626848. Its totient is φ = 20344464.

The previous prime is 31243393. The next prime is 31243417. The reversal of 31243413 is 31434213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31243413 - 2⁶ = 31243349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31243413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243417) 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, 120970 + ... + 121227.

It is an arithmetic number, because the mean of its divisors is an integer number (5328356).

Almost surely, 2^31243413 is an apocalyptic number.

It is an amenable number.

31243413 is a deficient number, since it is larger than the sum of its proper divisors (11383435).

31243413 is a wasteful number, since it uses less digits than its factorization.

31243413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242243.

The product of its digits is 864, while the sum is 21.

The square root of 31243413 is about 5589.5807535092. The cubic root of 31243413 is about 314.9581299854.

Adding to 31243413 its reverse (31434213), we get a palindrome (62677626).

The spelling of 31243413 in words is "thirty-one million, two hundred forty-three thousand, four hundred thirteen".