31220320244104 has 8 divisors (see below), whose sum is σ = 58538100457710. Its totient is φ = 15610160122048.

The previous prime is 31220320244089. The next prime is 31220320244143. The reversal of 31220320244104 is 40144202302213.

It can be written as a sum of positive squares in only one way, i.e., 28196206200100 + 3024114044004 = 5310010^2 + 1738998^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×31220320244104² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1951270015249 + ... + 1951270015264.

Almost surely, 2^{31220320244104} is an apocalyptic number.

It is an amenable number.

31220320244104 is a deficient number, since it is larger than the sum of its proper divisors (27317780213606).

31220320244104 is a wasteful number, since it uses less digits than its factorization.

31220320244104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902540030519 (or 3902540030515 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31220320244104 its reverse (40144202302213), we get a palindrome (71364522546317).

The spelling of 31220320244104 in words is "thirty-one trillion, two hundred twenty billion, three hundred twenty million, two hundred forty-four thousand, one hundred four".