31440310203142 has 4 divisors (see below), whose sum is σ = 47160465304716. Its totient is φ = 15720155101570.

The previous prime is 31440310203091. The next prime is 31440310203221. The reversal of 31440310203142 is 24130201304413.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31440310203142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7860077550784 + ... + 7860077550787.

It is an arithmetic number, because the mean of its divisors is an integer number (11790116326179).

Almost surely, 2^{31440310203142} is an apocalyptic number.

31440310203142 is a deficient number, since it is larger than the sum of its proper divisors (15720155101574).

31440310203142 is a wasteful number, since it uses less digits than its factorization.

31440310203142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15720155101573.

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

Adding to 31440310203142 its reverse (24130201304413), we get a palindrome (55570511507555).

The spelling of 31440310203142 in words is "thirty-one trillion, four hundred forty billion, three hundred ten million, two hundred three thousand, one hundred forty-two".