31000231343 has 4 divisors (see below), whose sum is σ = 31156011600. Its totient is φ = 30844451088.

The previous prime is 31000231277. The next prime is 31000231369. The reversal of 31000231343 is 34313200013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34313200013 = 1279 ⋅26828147.

It is a cyclic number.

It is not a de Polignac number, because 31000231343 - 2¹⁸ = 30999969199 is a prime.

It is a super-2 number, since 2×31000231343² (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 (31000261343) 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, 77889830 + ... + 77890227.

It is an arithmetic number, because the mean of its divisors is an integer number (7789002900).

Almost surely, 2^31000231343 is an apocalyptic number.

31000231343 is a deficient number, since it is larger than the sum of its proper divisors (155780257).

31000231343 is a wasteful number, since it uses less digits than its factorization.

31000231343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155780256.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31000231343 its reverse (34313200013), we get a palindrome (65313431356).

The spelling of 31000231343 in words is "thirty-one billion, two hundred thirty-one thousand, three hundred forty-three".