31140123442 has 16 divisors (see below), whose sum is σ = 46768178520. Its totient is φ = 15550746112.

The previous prime is 31140123401. The next prime is 31140123449. The reversal of 31140123442 is 24432104113.

It can be written as a sum of positive squares in 4 ways, for example, as 28244499721 + 2895623721 = 168061^2 + 53811^2 .

It is not an unprimeable number, because it can be changed into a prime (31140123449) by changing a digit.

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, 8812308 + ... + 8815840.

Almost surely, 2^31140123442 is an apocalyptic number.

31140123442 is a deficient number, since it is larger than the sum of its proper divisors (15628055078).

31140123442 is a wasteful number, since it uses less digits than its factorization.

31140123442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7757.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31140123442 its reverse (24432104113), we get a palindrome (55572227555).

The spelling of 31140123442 in words is "thirty-one billion, one hundred forty million, one hundred twenty-three thousand, four hundred forty-two".