31540351353342 has 64 divisors (see below), whose sum is σ = 68244447645696. Its totient is φ = 9660248801280.

The previous prime is 31540351353331. The next prime is 31540351353349. The reversal of 31540351353342 is 24335315304513.

It is a junction number, because it is equal to n+sod(n) for n = 31540351353294 and 31540351353303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31540351353349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186953367 + ... + 187121997.

It is an arithmetic number, because the mean of its divisors is an integer number (1066319494464).

Almost surely, 2^{31540351353342} is an apocalyptic number.

31540351353342 is an abundant number, since it is smaller than the sum of its proper divisors (36704096292354).

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

31540351353342 is a wasteful number, since it uses less digits than its factorization.

31540351353342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179625.

The product of its (nonzero) digits is 972000, while the sum is 42.

Adding to 31540351353342 its reverse (24335315304513), we get a palindrome (55875666657855).

The spelling of 31540351353342 in words is "thirty-one trillion, five hundred forty billion, three hundred fifty-one million, three hundred fifty-three thousand, three hundred forty-two".