13531520137 has 2 divisors, whose sum is σ = 13531520138. Its totient is φ = 13531520136.

The previous prime is 13531520131. The next prime is 13531520159. The reversal of 13531520137 is 73102513531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7530074176 + 6001445961 = 86776^2 + 77469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13531520137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13531520099 and 13531520108.

It is not a weakly prime, because it can be changed into another prime (13531520131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765760068 + 6765760069.

It is an arithmetic number, because the mean of its divisors is an integer number (6765760069).

Almost surely, 2^13531520137 is an apocalyptic number.

It is an amenable number.

13531520137 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531520137 is an equidigital number, since it uses as much as digits as its factorization.

13531520137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 31.

The spelling of 13531520137 in words is "thirteen billion, five hundred thirty-one million, five hundred twenty thousand, one hundred thirty-seven".