31203320142 has 16 divisors (see below), whose sum is σ = 62548801920. Its totient is φ = 10377413112.

The previous prime is 31203320119. The next prime is 31203320143. The reversal of 31203320142 is 24102330213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203320143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5920548 + ... + 5925815.

It is an arithmetic number, because the mean of its divisors is an integer number (3909300120).

Almost surely, 2^31203320142 is an apocalyptic number.

31203320142 is an abundant number, since it is smaller than the sum of its proper divisors (31345481778).

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

31203320142 is a wasteful number, since it uses less digits than its factorization.

31203320142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11846807.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31203320142 its reverse (24102330213), we get a palindrome (55305650355).

The spelling of 31203320142 in words is "thirty-one billion, two hundred three million, three hundred twenty thousand, one hundred forty-two".