31513043141 has 4 divisors (see below), whose sum is σ = 31625189484. Its totient is φ = 31400896800.

The previous prime is 31513043117. The next prime is 31513043147. The reversal of 31513043141 is 14134031513.

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 24545802241 + 6967240900 = 156671^2 + 83470^2 .

It is a cyclic number.

It is not a de Polignac number, because 31513043141 - 2⁶ = 31513043077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31513043141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31513043147) 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, 56072750 + ... + 56073311.

It is an arithmetic number, because the mean of its divisors is an integer number (7906297371).

Almost surely, 2^31513043141 is an apocalyptic number.

It is an amenable number.

31513043141 is a deficient number, since it is larger than the sum of its proper divisors (112146343).

31513043141 is a wasteful number, since it uses less digits than its factorization.

31513043141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112146342.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 31513043141 its reverse (14134031513), we get a palindrome (45647074654).

The spelling of 31513043141 in words is "thirty-one billion, five hundred thirteen million, forty-three thousand, one hundred forty-one".