31313144012 has 24 divisors (see below), whose sum is σ = 57194629632. Its totient is φ = 14972157200.

The previous prime is 31313143951. The next prime is 31313144087. The reversal of 31313144012 is 21044131313.

It is a super-2 number, since 2×31313144012² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353087 + ... + 432777.

It is an arithmetic number, because the mean of its divisors is an integer number (2383109568).

Almost surely, 2^31313144012 is an apocalyptic number.

It is an amenable number.

31313144012 is a deficient number, since it is larger than the sum of its proper divisors (25881485620).

31313144012 is a wasteful number, since it uses less digits than its factorization.

31313144012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83989 (or 83987 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31313144012 its reverse (21044131313), we get a palindrome (52357275325).

The spelling of 31313144012 in words is "thirty-one billion, three hundred thirteen million, one hundred forty-four thousand, twelve".