31223243044 has 48 divisors (see below), whose sum is σ = 62967179520. Its totient is φ = 13270118400.

The previous prime is 31223243027. The next prime is 31223243063. The reversal of 31223243044 is 44034232213.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2602692 + ... + 2614660.

It is an arithmetic number, because the mean of its divisors is an integer number (1311816240).

Almost surely, 2^31223243044 is an apocalyptic number.

It is an amenable number.

31223243044 is an abundant number, since it is smaller than the sum of its proper divisors (31743936476).

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

31223243044 is a wasteful number, since it uses less digits than its factorization.

31223243044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12748 (or 12746 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 31223243044 its reverse (44034232213), we get a palindrome (75257475257).

The spelling of 31223243044 in words is "thirty-one billion, two hundred twenty-three million, two hundred forty-three thousand, forty-four".