31440221342 has 8 divisors (see below), whose sum is σ = 47277940032. Its totient is φ = 15680908000.

The previous prime is 31440221317. The next prime is 31440221357. The reversal of 31440221342 is 24312204413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19600334 + ... + 19601937.

It is an arithmetic number, because the mean of its divisors is an integer number (5909742504).

Almost surely, 2^31440221342 is an apocalyptic number.

31440221342 is a deficient number, since it is larger than the sum of its proper divisors (15837718690).

31440221342 is a wasteful number, since it uses less digits than its factorization.

31440221342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39202674.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31440221342 its reverse (24312204413), we get a palindrome (55752425755).

The spelling of 31440221342 in words is "thirty-one billion, four hundred forty million, two hundred twenty-one thousand, three hundred forty-two".