31501454513 has 2 divisors, whose sum is σ = 31501454514. Its totient is φ = 31501454512.

The previous prime is 31501454477. The next prime is 31501454533. The reversal of 31501454513 is 31545410513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20191557409 + 11309897104 = 142097^2 + 106348^2 .

It is an emirp because it is prime and its reverse (31545410513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31501454513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31501454513.

It is not a weakly prime, because it can be changed into another prime (31501454533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15750727256 + 15750727257.

It is an arithmetic number, because the mean of its divisors is an integer number (15750727257).

Almost surely, 2^31501454513 is an apocalyptic number.

It is an amenable number.

31501454513 is a deficient number, since it is larger than the sum of its proper divisors (1).

31501454513 is an equidigital number, since it uses as much as digits as its factorization.

31501454513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 31501454513 in words is "thirty-one billion, five hundred one million, four hundred fifty-four thousand, five hundred thirteen".