31440243342 has 16 divisors (see below), whose sum is σ = 62907375312. Its totient is φ = 10475599680.

The previous prime is 31440243287. The next prime is 31440243353. The reversal of 31440243342 is 24334204413.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1105143 + ... + 1133234.

It is an arithmetic number, because the mean of its divisors is an integer number (3931710957).

Almost surely, 2^31440243342 is an apocalyptic number.

31440243342 is an abundant number, since it is smaller than the sum of its proper divisors (31467131970).

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

31440243342 is a wasteful number, since it uses less digits than its factorization.

31440243342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240723.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 31440243342 its reverse (24334204413), we get a palindrome (55774447755).

The spelling of 31440243342 in words is "thirty-one billion, four hundred forty million, two hundred forty-three thousand, three hundred forty-two".