31143404442 has 16 divisors (see below), whose sum is σ = 64434630240. Its totient is φ = 10023164592.

The previous prime is 31143404441. The next prime is 31143404443. The reversal of 31143404442 is 24440434113.

It is an interprime number because it is at equal distance from previous prime (31143404441) and next prime (31143404443).

It is not an unprimeable number, because it can be changed into a prime (31143404441) 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, 89492368 + ... + 89492715.

It is an arithmetic number, because the mean of its divisors is an integer number (4027164390).

Almost surely, 2^31143404442 is an apocalyptic number.

31143404442 is an abundant number, since it is smaller than the sum of its proper divisors (33291225798).

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

31143404442 is a wasteful number, since it uses less digits than its factorization.

31143404442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178985117.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 31143404442 its reverse (24440434113), we get a palindrome (55583838555).

The spelling of 31143404442 in words is "thirty-one billion, one hundred forty-three million, four hundred four thousand, four hundred forty-two".