31143031032 has 16 divisors (see below), whose sum is σ = 77857577640. Its totient is φ = 10381010336.

The previous prime is 31143031001. The next prime is 31143031039. The reversal of 31143031032 is 23013034113.

It is a super-2 number, since 2×31143031032² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143031039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648813123 + ... + 648813170.

Almost surely, 2^31143031032 is an apocalyptic number.

It is an amenable number.

31143031032 is an abundant number, since it is smaller than the sum of its proper divisors (46714546608).

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

31143031032 is a wasteful number, since it uses less digits than its factorization.

31143031032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297626302 (or 1297626298 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31143031032 its reverse (23013034113), we get a palindrome (54156065145).

The spelling of 31143031032 in words is "thirty-one billion, one hundred forty-three million, thirty-one thousand, thirty-two".