31143431032 has 32 divisors (see below), whose sum is σ = 66748348800. Its totient is φ = 13344699744.

The previous prime is 31143430949. The next prime is 31143431047. The reversal of 31143431032 is 23013434113.

It is a super-3 number, since 3×31143431032³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31143430988 and 31143431006.

It is a congruent number.

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, 269319 + ... + 367177.

It is an arithmetic number, because the mean of its divisors is an integer number (2085885900).

Almost surely, 2^31143431032 is an apocalyptic number.

It is an amenable number.

31143431032 is an abundant number, since it is smaller than the sum of its proper divisors (35604917768).

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

31143431032 is a wasteful number, since it uses less digits than its factorization.

31143431032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103555 (or 103551 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31143431032 its reverse (23013434113), we get a palindrome (54156865145).

The spelling of 31143431032 in words is "thirty-one billion, one hundred forty-three million, four hundred thirty-one thousand, thirty-two".