16772217 has 32 divisors (see below), whose sum is σ = 29528064. Its totient is φ = 8198400.

The previous prime is 16772207. The next prime is 16772227. The reversal of 16772217 is 71227761.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16772207) and next prime (16772227).

It is not a de Polignac number, because 16772217 - 2¹⁴ = 16755833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (16772207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1792 + ... + 6062.

It is an arithmetic number, because the mean of its divisors is an integer number (922752).

Almost surely, 2^16772217 is an apocalyptic number.

16772217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16772217 is a deficient number, since it is larger than the sum of its proper divisors (12755847).

16772217 is a wasteful number, since it uses less digits than its factorization.

16772217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309.

The product of its digits is 8232, while the sum is 33.

The square root of 16772217 is about 4095.3897250445. The cubic root of 16772217 is about 255.9745712454.

Adding to 16772217 its reverse (71227761), we get a palindrome (87999978).

The spelling of 16772217 in words is "sixteen million, seven hundred seventy-two thousand, two hundred seventeen".