31143002242 has 32 divisors (see below), whose sum is σ = 51405741504. Its totient is φ = 14032929600.

The previous prime is 31143002227. The next prime is 31143002249. The reversal of 31143002242 is 24220034113.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (31143002249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1308892 + ... + 1332472.

It is an arithmetic number, because the mean of its divisors is an integer number (1606429422).

Almost surely, 2^31143002242 is an apocalyptic number.

31143002242 is a deficient number, since it is larger than the sum of its proper divisors (20262739262).

31143002242 is a wasteful number, since it uses less digits than its factorization.

31143002242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24114.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31143002242 its reverse (24220034113), we get a palindrome (55363036355).

The spelling of 31143002242 in words is "thirty-one billion, one hundred forty-three million, two thousand, two hundred forty-two".