31004332443 has 16 divisors (see below), whose sum is σ = 52494108160. Its totient is φ = 17716761288.

The previous prime is 31004332433. The next prime is 31004332451. The reversal of 31004332443 is 34423340013.

It is not a de Polignac number, because 31004332443 - 2⁴ = 31004332427 is a prime.

It is a super-2 number, since 2×31004332443² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31004332423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82021855 + ... + 82022232.

It is an arithmetic number, because the mean of its divisors is an integer number (3280881760).

Almost surely, 2^31004332443 is an apocalyptic number.

31004332443 is a deficient number, since it is larger than the sum of its proper divisors (21489775717).

31004332443 is a wasteful number, since it uses less digits than its factorization.

31004332443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164044103 (or 164044097 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 31004332443 its reverse (34423340013), we get a palindrome (65427672456).

The spelling of 31004332443 in words is "thirty-one billion, four million, three hundred thirty-two thousand, four hundred forty-three".