31143043432 has 32 divisors (see below), whose sum is σ = 59770608480. Its totient is φ = 15204450240.

The previous prime is 31143043339. The next prime is 31143043439. The reversal of 31143043432 is 23434034113.

It is a self number, because there is not a number n which added to its sum of digits gives 31143043432.

It is not an unprimeable number, because it can be changed into a prime (31143043439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1187938 + ... + 1213870.

It is an arithmetic number, because the mean of its divisors is an integer number (1867831515).

Almost surely, 2^31143043432 is an apocalyptic number.

It is an amenable number.

31143043432 is a deficient number, since it is larger than the sum of its proper divisors (28627565048).

31143043432 is a wasteful number, since it uses less digits than its factorization.

31143043432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29473 (or 29469 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 31143043432 its reverse (23434034113), we get a palindrome (54577077545).

The spelling of 31143043432 in words is "thirty-one billion, one hundred forty-three million, forty-three thousand, four hundred thirty-two".