31343121442 has 16 divisors (see below), whose sum is σ = 49784873400. Its totient is φ = 14748334848.

The previous prime is 31343121437. The next prime is 31343121577. The reversal of 31343121442 is 24412134313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30944679921 + 398441521 = 175911^2 + 19961^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31343121442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393184 + ... + 466132.

Almost surely, 2^31343121442 is an apocalyptic number.

31343121442 is a deficient number, since it is larger than the sum of its proper divisors (18441751958).

31343121442 is a wasteful number, since it uses less digits than its factorization.

31343121442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85605.

The product of its digits is 6912, while the sum is 28.

Adding to 31343121442 its reverse (24412134313), we get a palindrome (55755255755).

The spelling of 31343121442 in words is "thirty-one billion, three hundred forty-three million, one hundred twenty-one thousand, four hundred forty-two".