31223220144334 has 16 divisors (see below), whose sum is σ = 47466117906768. Its totient is φ = 15402579043392.

The previous prime is 31223220144331. The next prime is 31223220144353. The reversal of 31223220144334 is 43344102232213.

It is a self number, because there is not a number n which added to its sum of digits gives 31223220144334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223220144331) 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, 349505517 + ... + 349594840.

It is an arithmetic number, because the mean of its divisors is an integer number (2966632369173).

Almost surely, 2^{31223220144334} is an apocalyptic number.

31223220144334 is a deficient number, since it is larger than the sum of its proper divisors (16242897762434).

31223220144334 is a wasteful number, since it uses less digits than its factorization.

31223220144334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699100659.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 31223220144334 its reverse (43344102232213), we get a palindrome (74567322376547).

The spelling of 31223220144334 in words is "thirty-one trillion, two hundred twenty-three billion, two hundred twenty million, one hundred forty-four thousand, three hundred thirty-four".