31511242343 has 8 divisors (see below), whose sum is σ = 36018562560. Its totient is φ = 27005350680.

The previous prime is 31511242339. The next prime is 31511242369. The reversal of 31511242343 is 34324211513.

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

It is not a de Polignac number, because 31511242343 - 2² = 31511242339 is a prime.

It is a super-2 number, since 2×31511242343² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31511248343) 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, 309443 + ... + 398468.

It is an arithmetic number, because the mean of its divisors is an integer number (4502320320).

Almost surely, 2^31511242343 is an apocalyptic number.

31511242343 is a deficient number, since it is larger than the sum of its proper divisors (4507320217).

31511242343 is an equidigital number, since it uses as much as digits as its factorization.

31511242343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714277.

The product of its digits is 8640, while the sum is 29.

Adding to 31511242343 its reverse (34324211513), we get a palindrome (65835453856).

The spelling of 31511242343 in words is "thirty-one billion, five hundred eleven million, two hundred forty-two thousand, three hundred forty-three".