31243032243 has 24 divisors (see below), whose sum is σ = 45561683232. Its totient is φ = 20629179648.

The previous prime is 31243032241. The next prime is 31243032251. The reversal of 31243032243 is 34223034213.

31243032243 is a `hidden beast` number, since 3 + 1 + 2 + 430 + 3 + 224 + 3 = 666.

It is not a de Polignac number, because 31243032243 - 2¹ = 31243032241 is a prime.

It is a super-2 number, since 2×31243032243² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31243032241) 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, 1467130 + ... + 1488272.

It is an arithmetic number, because the mean of its divisors is an integer number (1898403468).

Almost surely, 2^31243032243 is an apocalyptic number.

31243032243 is a deficient number, since it is larger than the sum of its proper divisors (14318650989).

31243032243 is a wasteful number, since it uses less digits than its factorization.

31243032243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22715 (or 22712 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 31243032243 its reverse (34223034213), we get a palindrome (65466066456).

The spelling of 31243032243 in words is "thirty-one billion, two hundred forty-three million, thirty-two thousand, two hundred forty-three".