31550343141 has 4 divisors (see below), whose sum is σ = 42067124192. Its totient is φ = 21033562092.

The previous prime is 31550343131. The next prime is 31550343157. The reversal of 31550343141 is 14134305513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14134305513 = 3 ⋅4711435171.

It is not a de Polignac number, because 31550343141 - 2¹⁴ = 31550326757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31550343099 and 31550343108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31550343131) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5258390521 + ... + 5258390526.

It is an arithmetic number, because the mean of its divisors is an integer number (10516781048).

Almost surely, 2^31550343141 is an apocalyptic number.

It is an amenable number.

31550343141 is a deficient number, since it is larger than the sum of its proper divisors (10516781051).

31550343141 is a wasteful number, since it uses less digits than its factorization.

31550343141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10516781050.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 31550343141 its reverse (14134305513), we get a palindrome (45684648654).

The spelling of 31550343141 in words is "thirty-one billion, five hundred fifty million, three hundred forty-three thousand, one hundred forty-one".