16111254431 has 4 divisors (see below), whose sum is σ = 16384326600. Its totient is φ = 15838182264.

The previous prime is 16111254407. The next prime is 16111254437. The reversal of 16111254431 is 13445211161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13445211161 = 1291 ⋅10414571.

It is a cyclic number.

It is not a de Polignac number, because 16111254431 - 2¹⁴ = 16111238047 is a prime.

It is a super-2 number, since 2×16111254431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16111254394 and 16111254403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16111254437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136535996 + ... + 136536113.

It is an arithmetic number, because the mean of its divisors is an integer number (4096081650).

Almost surely, 2^16111254431 is an apocalyptic number.

16111254431 is a deficient number, since it is larger than the sum of its proper divisors (273072169).

16111254431 is an equidigital number, since it uses as much as digits as its factorization.

16111254431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273072168.

The product of its digits is 2880, while the sum is 29.

Adding to 16111254431 its reverse (13445211161), we get a palindrome (29556465592).

The spelling of 16111254431 in words is "sixteen billion, one hundred eleven million, two hundred fifty-four thousand, four hundred thirty-one".