13550205531 has 16 divisors (see below), whose sum is σ = 18301084160. Its totient is φ = 8916467040.

The previous prime is 13550205517. The next prime is 13550205541.

13550205531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13550205531 - 2⁶ = 13550205467 is a prime.

It is a super-2 number, since 2×13550205531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13550205541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1084701 + ... + 1097121.

It is an arithmetic number, because the mean of its divisors is an integer number (1143817760).

Almost surely, 2^13550205531 is an apocalyptic number.

13550205531 is a deficient number, since it is larger than the sum of its proper divisors (4750878629).

13550205531 is a wasteful number, since it uses less digits than its factorization.

13550205531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17106.

The product of its (nonzero) digits is 11250, while the sum is 30.

The spelling of 13550205531 in words is "thirteen billion, five hundred fifty million, two hundred five thousand, five hundred thirty-one".