31205504340142 has 64 divisors (see below), whose sum is σ = 53146889510400. Its totient is φ = 13611607390080.

The previous prime is 31205504340139. The next prime is 31205504340173. The reversal of 31205504340142 is 24104340550213.

It is a super-2 number, since 2×31205504340142² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31205504340098 and 31205504340107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1794545584 + ... + 1794562972.

It is an arithmetic number, because the mean of its divisors is an integer number (830420148600).

Almost surely, 2^{31205504340142} is an apocalyptic number.

31205504340142 is a deficient number, since it is larger than the sum of its proper divisors (21941385170258).

31205504340142 is a wasteful number, since it uses less digits than its factorization.

31205504340142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34441.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 31205504340142 its reverse (24104340550213), we get a palindrome (55309844890355).

The spelling of 31205504340142 in words is "thirty-one trillion, two hundred five billion, five hundred four million, three hundred forty thousand, one hundred forty-two".