31381735742 has 32 divisors (see below), whose sum is σ = 53963685120. Its totient is φ = 13407768000.

The previous prime is 31381735729. The next prime is 31381735807. The reversal of 31381735742 is 24753718313.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31381735693 and 31381735702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13940117 + ... + 13942367.

It is an arithmetic number, because the mean of its divisors is an integer number (1686365160).

Almost surely, 2^31381735742 is an apocalyptic number.

31381735742 is a deficient number, since it is larger than the sum of its proper divisors (22581949378).

31381735742 is a wasteful number, since it uses less digits than its factorization.

31381735742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896.

The product of its digits is 423360, while the sum is 44.

The spelling of 31381735742 in words is "thirty-one billion, three hundred eighty-one million, seven hundred thirty-five thousand, seven hundred forty-two".