16055509531 has 4 divisors (see below), whose sum is σ = 16055876872. Its totient is φ = 16055142192.

The previous prime is 16055509517. The next prime is 16055509601. The reversal of 16055509531 is 13590555061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13590555061 = 1901 ⋅7149161.

It is a cyclic number.

It is not a de Polignac number, because 16055509531 - 2²³ = 16047120923 is a prime.

It is a super-2 number, since 2×16055509531² (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 (16055509031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107610 + ... + 209023.

It is an arithmetic number, because the mean of its divisors is an integer number (4013969218).

Almost surely, 2^16055509531 is an apocalyptic number.

16055509531 is a deficient number, since it is larger than the sum of its proper divisors (367341).

16055509531 is an equidigital number, since it uses as much as digits as its factorization.

16055509531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367340.

The product of its (nonzero) digits is 101250, while the sum is 40.

The spelling of 16055509531 in words is "sixteen billion, fifty-five million, five hundred nine thousand, five hundred thirty-one".