16534481 has 2 divisors, whose sum is σ = 16534482. Its totient is φ = 16534480.

The previous prime is 16534471. The next prime is 16534517. The reversal of 16534481 is 18443561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16072081 + 462400 = 4009^2 + 680^2 .

It is an emirp because it is prime and its reverse (18443561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16534481 - 2¹⁴ = 16518097 is a prime.

It is a super-2 number, since 2×16534481² = 546778123878722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16534411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8267240 + 8267241.

It is an arithmetic number, because the mean of its divisors is an integer number (8267241).

Almost surely, 2^16534481 is an apocalyptic number.

It is an amenable number.

16534481 is a deficient number, since it is larger than the sum of its proper divisors (1).

16534481 is an equidigital number, since it uses as much as digits as its factorization.

16534481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 16534481 is about 4066.2613049336. The cubic root of 16534481 is about 254.7593834332.

The spelling of 16534481 in words is "sixteen million, five hundred thirty-four thousand, four hundred eighty-one".