16308539231 has 4 divisors (see below), whose sum is σ = 16531943952. Its totient is φ = 16085134512.

The previous prime is 16308539227. The next prime is 16308539243. The reversal of 16308539231 is 13293580361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13293580361 = 103 ⋅129063887.

It is a cyclic number.

It is not a de Polignac number, because 16308539231 - 2² = 16308539227 is a prime.

It is a super-2 number, since 2×16308539231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16308539251) 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, 111702251 + ... + 111702396.

It is an arithmetic number, because the mean of its divisors is an integer number (4132985988).

Almost surely, 2^16308539231 is an apocalyptic number.

16308539231 is a deficient number, since it is larger than the sum of its proper divisors (223404721).

16308539231 is an equidigital number, since it uses as much as digits as its factorization.

16308539231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223404720.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 16308539231 in words is "sixteen billion, three hundred eight million, five hundred thirty-nine thousand, two hundred thirty-one".