31223203051240 has 32 divisors (see below), whose sum is σ = 70277270338080. Its totient is φ = 12484825492032.

The previous prime is 31223203051211. The next prime is 31223203051291. The reversal of 31223203051240 is 4215030232213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31223203051199 and 31223203051208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139127994 + ... + 139352233.

It is an arithmetic number, because the mean of its divisors is an integer number (2196164698065).

Almost surely, 2^{31223203051240} is an apocalyptic number.

It is an amenable number.

31223203051240 is an abundant number, since it is smaller than the sum of its proper divisors (39054067286840).

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

31223203051240 is a wasteful number, since it uses less digits than its factorization.

31223203051240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278483041 (or 278483037 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 31223203051240 its reverse (4215030232213), we get a palindrome (35438233283453).

The spelling of 31223203051240 in words is "thirty-one trillion, two hundred twenty-three billion, two hundred three million, fifty-one thousand, two hundred forty".