16229261 has 4 divisors (see below), whose sum is σ = 16278624. Its totient is φ = 16179900.

The previous prime is 16229243. The next prime is 16229263. The reversal of 16229261 is 16292261.

It is a happy number.

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: 16292261 = 2879 ⋅5659.

It is a cyclic number.

It is not a de Polignac number, because 16229261 - 2¹⁴ = 16212877 is a prime.

It is a super-2 number, since 2×16229261² = 526777825212242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16229263) 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, 24185 + ... + 24846.

It is an arithmetic number, because the mean of its divisors is an integer number (4069656).

Almost surely, 2^16229261 is an apocalyptic number.

It is an amenable number.

16229261 is a deficient number, since it is larger than the sum of its proper divisors (49363).

16229261 is an equidigital number, since it uses as much as digits as its factorization.

16229261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49362.

The product of its digits is 2592, while the sum is 29.

The square root of 16229261 is about 4028.5556965245. Note that the first 3 decimals coincide. The cubic root of 16229261 is about 253.1820516832.

The spelling of 16229261 in words is "sixteen million, two hundred twenty-nine thousand, two hundred sixty-one".