16222261 has 4 divisors (see below), whose sum is σ = 17697024. Its totient is φ = 14747500.

The previous prime is 16222259. The next prime is 16222277.

16222261 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 16222261 - 2¹ = 16222259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16222211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737365 + ... + 737386.

It is an arithmetic number, because the mean of its divisors is an integer number (4424256).

Almost surely, 2^16222261 is an apocalyptic number.

16222261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16222261 is a deficient number, since it is larger than the sum of its proper divisors (1474763).

16222261 is a wasteful number, since it uses less digits than its factorization.

16222261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474762.

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

The square root of 16222261 is about 4027.6868051029. The cubic root of 16222261 is about 253.1456456462.

It can be divided in two parts, 1622 and 2261, that added together give a palindrome (3883).

The spelling of 16222261 in words is "sixteen million, two hundred twenty-two thousand, two hundred sixty-one".