31434043243 has 4 divisors (see below), whose sum is σ = 31440818088. Its totient is φ = 31427268400.

The previous prime is 31434043219. The next prime is 31434043253. The reversal of 31434043243 is 34234043413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34234043413 = 541 ⋅63279193.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31434043243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31434043253) 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, 3380458 + ... + 3389743.

It is an arithmetic number, because the mean of its divisors is an integer number (7860204522).

Almost surely, 2^31434043243 is an apocalyptic number.

31434043243 is a deficient number, since it is larger than the sum of its proper divisors (6774845).

31434043243 is an equidigital number, since it uses as much as digits as its factorization.

31434043243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6774844.

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

Adding to 31434043243 its reverse (34234043413), we get a palindrome (65668086656).

The spelling of 31434043243 in words is "thirty-one billion, four hundred thirty-four million, forty-three thousand, two hundred forty-three".