31431131001242 has 32 divisors (see below), whose sum is σ = 54148613726592. Its totient is φ = 13403963994624.

The previous prime is 31431131001197. The next prime is 31431131001247. The reversal of 31431131001242 is 24210013113413.

It is not an unprimeable number, because it can be changed into a prime (31431131001247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3617363 + ... + 8714790.

It is an arithmetic number, because the mean of its divisors is an integer number (1692144178956).

Almost surely, 2^{31431131001242} is an apocalyptic number.

31431131001242 is a deficient number, since it is larger than the sum of its proper divisors (22717482725350).

31431131001242 is a wasteful number, since it uses less digits than its factorization.

31431131001242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12333062.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 31431131001242 its reverse (24210013113413), we get a palindrome (55641144114655).

The spelling of 31431131001242 in words is "thirty-one trillion, four hundred thirty-one billion, one hundred thirty-one million, one thousand, two hundred forty-two".