16204261 has 4 divisors (see below), whose sum is σ = 16642252. Its totient is φ = 15766272.

The previous prime is 16204231. The next prime is 16204277. The reversal of 16204261 is 16240261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6155361 + 10048900 = 2481^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 16204261 - 2⁵ = 16204229 is a prime.

It is a super-2 number, since 2×16204261² = 525156149112242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16204211) 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, 218940 + ... + 219013.

It is an arithmetic number, because the mean of its divisors is an integer number (4160563).

Almost surely, 2^16204261 is an apocalyptic number.

It is an amenable number.

16204261 is a deficient number, since it is larger than the sum of its proper divisors (437991).

16204261 is an equidigital number, since it uses as much as digits as its factorization.

16204261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437990.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16204261 is about 4025.4516516784. The cubic root of 16204261 is about 253.0519820074.

The spelling of 16204261 in words is "sixteen million, two hundred four thousand, two hundred sixty-one".