31005445112 has 16 divisors (see below), whose sum is σ = 58280191200. Its totient is φ = 15464060800.

The previous prime is 31005445103. The next prime is 31005445139. The reversal of 31005445112 is 21154450013.

It is a super-2 number, since 2×31005445112² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4829312 + ... + 4835727.

It is an arithmetic number, because the mean of its divisors is an integer number (3642511950).

Almost surely, 2^31005445112 is an apocalyptic number.

It is an amenable number.

31005445112 is a deficient number, since it is larger than the sum of its proper divisors (27274746088).

31005445112 is a wasteful number, since it uses less digits than its factorization.

31005445112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9665446 (or 9665442 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 31005445112 its reverse (21154450013), we get a palindrome (52159895125).

The spelling of 31005445112 in words is "thirty-one billion, five million, four hundred forty-five thousand, one hundred twelve".