16529081 has 4 divisors (see below), whose sum is σ = 16541952. Its totient is φ = 16516212.

The previous prime is 16529063. The next prime is 16529089. The reversal of 16529081 is 18092561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18092561 = 31 ⋅583631.

It is a cyclic number.

It is not a de Polignac number, because 16529081 - 2¹⁴ = 16512697 is a prime.

It is a super-2 number, since 2×16529081² = 546421037409122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16529089) 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, 4265 + ... + 7158.

It is an arithmetic number, because the mean of its divisors is an integer number (4135488).

Almost surely, 2^16529081 is an apocalyptic number.

It is an amenable number.

16529081 is a deficient number, since it is larger than the sum of its proper divisors (12871).

16529081 is a wasteful number, since it uses less digits than its factorization.

16529081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12870.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 16529081 is about 4065.5972500975. The cubic root of 16529081 is about 254.7316464380.

The spelling of 16529081 in words is "sixteen million, five hundred twenty-nine thousand, eighty-one".