31223442550105 has 16 divisors (see below), whose sum is σ = 40517723618064. Its totient is φ = 22961637918720.

The previous prime is 31223442550073. The next prime is 31223442550129. The reversal of 31223442550105 is 50105524432213.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5118973209 + 31218323576896 = 71547^2 + 5587336^2 .

It is not a de Polignac number, because 31223442550105 - 2⁵ = 31223442550073 is a prime.

It is a super-2 number, since 2×31223442550105² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

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, 996583204 + ... + 996614533.

It is an arithmetic number, because the mean of its divisors is an integer number (2532357726129).

Almost surely, 2^{31223442550105} is an apocalyptic number.

It is an amenable number.

31223442550105 is a deficient number, since it is larger than the sum of its proper divisors (9294281067959).

31223442550105 is a wasteful number, since it uses less digits than its factorization.

31223442550105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993197996.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 31223442550105 its reverse (50105524432213), we get a palindrome (81328966982318).

The spelling of 31223442550105 in words is "thirty-one trillion, two hundred twenty-three billion, four hundred forty-two million, five hundred fifty thousand, one hundred five".