31234210243 has 4 divisors (see below), whose sum is σ = 32592219408. Its totient is φ = 29876201080.

The previous prime is 31234210207. The next prime is 31234210247. The reversal of 31234210243 is 34201243213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34201243213 = 73 ⋅468510181.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31234210243 is a prime.

It is a super-2 number, since 2×31234210243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31234210247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679004548 + ... + 679004593.

It is an arithmetic number, because the mean of its divisors is an integer number (8148054852).

Almost surely, 2^31234210243 is an apocalyptic number.

31234210243 is a deficient number, since it is larger than the sum of its proper divisors (1358009165).

31234210243 is a wasteful number, since it uses less digits than its factorization.

31234210243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358009164.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31234210243 its reverse (34201243213), we get a palindrome (65435453456).

The spelling of 31234210243 in words is "thirty-one billion, two hundred thirty-four million, two hundred ten thousand, two hundred forty-three".