16222787 has 4 divisors (see below), whose sum is σ = 18540336. Its totient is φ = 13905240.

The previous prime is 16222771. The next prime is 16222807. The reversal of 16222787 is 78722261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78722261 = 23 ⋅3422707.

It is a cyclic number.

It is not a de Polignac number, because 16222787 - 2⁴ = 16222771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16222727) 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, 1158764 + ... + 1158777.

It is an arithmetic number, because the mean of its divisors is an integer number (4635084).

Almost surely, 2^16222787 is an apocalyptic number.

16222787 is a deficient number, since it is larger than the sum of its proper divisors (2317549).

16222787 is an equidigital number, since it uses as much as digits as its factorization.

16222787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317548.

The product of its digits is 18816, while the sum is 35.

The square root of 16222787 is about 4027.7521026002. The cubic root of 16222787 is about 253.1483816637.

The spelling of 16222787 in words is "sixteen million, two hundred twenty-two thousand, seven hundred eighty-seven".