31405144505122 has 16 divisors (see below), whose sum is σ = 48944924825400. Its totient is φ = 15094898542080.

The previous prime is 31405144505089. The next prime is 31405144505123. The reversal of 31405144505122 is 22150544150413.

It can be written as a sum of positive squares in 4 ways, for example, as 29884907290681 + 1520237214441 = 5466709^2 + 1232979^2 .

It is a super-4 number, since 4×31405144505122⁴ (a number of 55 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (31405144505123) 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, 1182231279 + ... + 1182257842.

Almost surely, 2^{31405144505122} is an apocalyptic number.

31405144505122 is a deficient number, since it is larger than the sum of its proper divisors (17539780320278).

31405144505122 is a wasteful number, since it uses less digits than its factorization.

31405144505122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364489381.

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 31405144505122 its reverse (22150544150413), we get a palindrome (53555688655535).

The spelling of 31405144505122 in words is "thirty-one trillion, four hundred five billion, one hundred forty-four million, five hundred five thousand, one hundred twenty-two".