31234342243 has 16 divisors (see below), whose sum is σ = 33836152896. Its totient is φ = 28661391360.

The previous prime is 31234342241. The next prime is 31234342253. The reversal of 31234342243 is 34224343213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31234342243 - 2¹ = 31234342241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31234342241) 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, 1933546 + ... + 1949632.

It is an arithmetic number, because the mean of its divisors is an integer number (2114759556).

Almost surely, 2^31234342243 is an apocalyptic number.

31234342243 is a deficient number, since it is larger than the sum of its proper divisors (2601810653).

31234342243 is a wasteful number, since it uses less digits than its factorization.

31234342243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16974.

The product of its digits is 41472, while the sum is 31.

Adding to 31234342243 its reverse (34224343213), we get a palindrome (65458685456).

The spelling of 31234342243 in words is "thirty-one billion, two hundred thirty-four million, three hundred forty-two thousand, two hundred forty-three".