31004304143 has 4 divisors (see below), whose sum is σ = 31004709648. Its totient is φ = 31003898640.

The previous prime is 31004304127. The next prime is 31004304151. The reversal of 31004304143 is 34140340013.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 34140340013 = 13 ⋅2626180001.

It is a cyclic number.

It is not a de Polignac number, because 31004304143 - 2⁴ = 31004304127 is a prime.

It is a super-2 number, since 2×31004304143² (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 (31004304103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49403 + ... + 253868.

It is an arithmetic number, because the mean of its divisors is an integer number (7751177412).

Almost surely, 2^31004304143 is an apocalyptic number.

31004304143 is a deficient number, since it is larger than the sum of its proper divisors (405505).

31004304143 is a wasteful number, since it uses less digits than its factorization.

31004304143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405504.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31004304143 its reverse (34140340013), we get a palindrome (65144644156).

The spelling of 31004304143 in words is "thirty-one billion, four million, three hundred four thousand, one hundred forty-three".