31540324513 has 16 divisors (see below), whose sum is σ = 33805900800. Its totient is φ = 29360600640.

The previous prime is 31540324477. The next prime is 31540324549. The reversal of 31540324513 is 31542304513.

It is an interprime number because it is at equal distance from previous prime (31540324477) and next prime (31540324549).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31540324513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31540324583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176620 + ... + 307042.

It is an arithmetic number, because the mean of its divisors is an integer number (2112868800).

Almost surely, 2^31540324513 is an apocalyptic number.

It is an amenable number.

31540324513 is a deficient number, since it is larger than the sum of its proper divisors (2265576287).

31540324513 is a wasteful number, since it uses less digits than its factorization.

31540324513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130752.

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

The spelling of 31540324513 in words is "thirty-one billion, five hundred forty million, three hundred twenty-four thousand, five hundred thirteen".