13217537487 has 72 divisors (see below), whose sum is σ = 23261661696. Its totient is φ = 6644484000.

The previous prime is 13217537467. The next prime is 13217537507. The reversal of 13217537487 is 78473571231.

It is an interprime number because it is at equal distance from previous prime (13217537467) and next prime (13217537507).

It is not a de Polignac number, because 13217537487 - 2¹¹ = 13217535439 is a prime.

It is a super-3 number, since 3×13217537487³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13217537467) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 539412 + ... + 563382.

Almost surely, 2^13217537487 is an apocalyptic number.

13217537487 is a deficient number, since it is larger than the sum of its proper divisors (10044124209).

13217537487 is a wasteful number, since it uses less digits than its factorization.

13217537487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24041 (or 24023 counting only the distinct ones).

The product of its digits is 987840, while the sum is 48.

The spelling of 13217537487 in words is "thirteen billion, two hundred seventeen million, five hundred thirty-seven thousand, four hundred eighty-seven".