16488281 has 2 divisors, whose sum is σ = 16488282. Its totient is φ = 16488280.

The previous prime is 16488253. The next prime is 16488289. The reversal of 16488281 is 18288461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 4343056 = 3485^2 + 2084^2 .

It is a cyclic number.

It is not a de Polignac number, because 16488281 - 2¹⁸ = 16226137 is a prime.

It is a super-2 number, since 2×16488281² = 543726820669922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16488289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8244140 + 8244141.

It is an arithmetic number, because the mean of its divisors is an integer number (8244141).

Almost surely, 2^16488281 is an apocalyptic number.

It is an amenable number.

16488281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16488281 is an equidigital number, since it uses as much as digits as its factorization.

16488281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24576, while the sum is 38.

The square root of 16488281 is about 4060.5764369114. The cubic root of 16488281 is about 254.5218825227.

The spelling of 16488281 in words is "sixteen million, four hundred eighty-eight thousand, two hundred eighty-one".