31143031442 has 16 divisors (see below), whose sum is σ = 52065750240. Its totient is φ = 13884199488.

The previous prime is 31143031441. The next prime is 31143031463. The reversal of 31143031442 is 24413034113.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31143031441) 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, 24103868 + ... + 24105159.

It is an arithmetic number, because the mean of its divisors is an integer number (3254109390).

Almost surely, 2^31143031442 is an apocalyptic number.

31143031442 is a deficient number, since it is larger than the sum of its proper divisors (20922718798).

31143031442 is a wasteful number, since it uses less digits than its factorization.

31143031442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48209065.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31143031442 its reverse (24413034113), we get a palindrome (55556065555).

The spelling of 31143031442 in words is "thirty-one billion, one hundred forty-three million, thirty-one thousand, four hundred forty-two".