16881541 has 2 divisors, whose sum is σ = 16881542. Its totient is φ = 16881540.

The previous prime is 16881523. The next prime is 16881569. The reversal of 16881541 is 14518861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14062500 + 2819041 = 3750^2 + 1679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16881541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16881497 and 16881506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16881511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8440770 + 8440771.

It is an arithmetic number, because the mean of its divisors is an integer number (8440771).

Almost surely, 2^16881541 is an apocalyptic number.

It is an amenable number.

16881541 is a deficient number, since it is larger than the sum of its proper divisors (1).

16881541 is an equidigital number, since it uses as much as digits as its factorization.

16881541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 34.

The square root of 16881541 is about 4108.7152493206. The cubic root of 16881541 is about 256.5295283210.

The spelling of 16881541 in words is "sixteen million, eight hundred eighty-one thousand, five hundred forty-one".