31011431112 has 24 divisors (see below), whose sum is σ = 83989292790. Its totient is φ = 10337143680.

The previous prime is 31011431081. The next prime is 31011431117. The reversal of 31011431112 is 21113411013.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30992194116 + 19236996 = 176046^2 + 4386^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×31011431112² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31011431117) 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 5 ways as a sum of consecutive naturals, for example, 215357089 + ... + 215357232.

Almost surely, 2^31011431112 is an apocalyptic number.

It is an amenable number.

31011431112 is an abundant number, since it is smaller than the sum of its proper divisors (52977861678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31011431112 is a wasteful number, since it uses less digits than its factorization.

31011431112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430714333 (or 430714326 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 31011431112 its reverse (21113411013), we get a palindrome (52124842125).

The spelling of 31011431112 in words is "thirty-one billion, eleven million, four hundred thirty-one thousand, one hundred twelve".