31143143031 has 64 divisors (see below), whose sum is σ = 58176921600. Its totient is φ = 14284448640.

The previous prime is 31143142999. The next prime is 31143143041. The reversal of 31143143031 is 13034134113.

It is not a de Polignac number, because 31143143031 - 2⁵ = 31143142999 is a prime.

It is a super-2 number, since 2×31143143031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31143142992 and 31143143010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143143041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156381 + ... + 294518.

It is an arithmetic number, because the mean of its divisors is an integer number (909014400).

Almost surely, 2^31143143031 is an apocalyptic number.

31143143031 is a deficient number, since it is larger than the sum of its proper divisors (27033778569).

31143143031 is a wasteful number, since it uses less digits than its factorization.

31143143031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450956.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31143143031 its reverse (13034134113), we get a palindrome (44177277144).

The spelling of 31143143031 in words is "thirty-one billion, one hundred forty-three million, one hundred forty-three thousand, thirty-one".