31540320341 has 4 divisors (see below), whose sum is σ = 31542703500. Its totient is φ = 31537937184.

The previous prime is 31540320289. The next prime is 31540320347. The reversal of 31540320341 is 14302304513.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6029522500 + 25510797841 = 77650^2 + 159721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31540320341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31540320341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31540320347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171616 + ... + 1198233.

It is an arithmetic number, because the mean of its divisors is an integer number (7885675875).

Almost surely, 2^31540320341 is an apocalyptic number.

It is an amenable number.

31540320341 is a deficient number, since it is larger than the sum of its proper divisors (2383159).

31540320341 is a wasteful number, since it uses less digits than its factorization.

31540320341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383158.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 31540320341 its reverse (14302304513), we get a palindrome (45842624854).

The spelling of 31540320341 in words is "thirty-one billion, five hundred forty million, three hundred twenty thousand, three hundred forty-one".