31143000005 has 8 divisors (see below), whose sum is σ = 40246338552. Its totient is φ = 22997907648.

The previous prime is 31143000001. The next prime is 31143000023. The reversal of 31143000005 is 50000034113.

It can be written as a sum of positive squares in 4 ways, for example, as 5564115649 + 25578884356 = 74593^2 + 159934^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31143000005 - 2² = 31143000001 is a prime.

It is a super-2 number, since 2×31143000005² (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 (31143000001) 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, 239561474 + ... + 239561603.

It is an arithmetic number, because the mean of its divisors is an integer number (5030792319).

Almost surely, 2^31143000005 is an apocalyptic number.

It is an amenable number.

31143000005 is a deficient number, since it is larger than the sum of its proper divisors (9103338547).

31143000005 is a wasteful number, since it uses less digits than its factorization.

31143000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479123095.

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 31143000005 its reverse (50000034113), we get a palindrome (81143034118).

The spelling of 31143000005 in words is "thirty-one billion, one hundred forty-three million, five", and thus it is an aban number.