31431535241442 has 32 divisors (see below), whose sum is σ = 72014158829184. Its totient is φ = 8959107427200.

The previous prime is 31431535241437. The next prime is 31431535241467. The reversal of 31431535241442 is 24414253513413.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 31431535241394 and 31431535241403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 888782659 + ... + 888818022.

It is an arithmetic number, because the mean of its divisors is an integer number (2250442463412).

Almost surely, 2^{31431535241442} is an apocalyptic number.

31431535241442 is an abundant number, since it is smaller than the sum of its proper divisors (40582623587742).

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

31431535241442 is a wasteful number, since it uses less digits than its factorization.

31431535241442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777601114.

The product of its digits is 691200, while the sum is 42.

Adding to 31431535241442 its reverse (24414253513413), we get a palindrome (55845788754855).

The spelling of 31431535241442 in words is "thirty-one trillion, four hundred thirty-one billion, five hundred thirty-five million, two hundred forty-one thousand, four hundred forty-two".