31550343142 has 4 divisors (see below), whose sum is σ = 47325514716. Its totient is φ = 15775171570.

The previous prime is 31550343131. The next prime is 31550343157. The reversal of 31550343142 is 24134305513.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7887585784 + ... + 7887585787.

It is an arithmetic number, because the mean of its divisors is an integer number (11831378679).

Almost surely, 2^31550343142 is an apocalyptic number.

31550343142 is a deficient number, since it is larger than the sum of its proper divisors (15775171574).

31550343142 is a wasteful number, since it uses less digits than its factorization.

31550343142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15775171573.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 31550343142 its reverse (24134305513), we get a palindrome (55684648655).

The spelling of 31550343142 in words is "thirty-one billion, five hundred fifty million, three hundred forty-three thousand, one hundred forty-two".