16722471 has 8 divisors (see below), whose sum is σ = 22472704. Its totient is φ = 11060280.

The previous prime is 16722467. The next prime is 16722481. The reversal of 16722471 is 17422761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16722471 - 2² = 16722467 is a prime.

It is a super-3 number, since 3×16722471³ (a number of 23 digits) contains 333 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 (16722481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21565 + ... + 22326.

It is an arithmetic number, because the mean of its divisors is an integer number (2809088).

Almost surely, 2^16722471 is an apocalyptic number.

16722471 is a deficient number, since it is larger than the sum of its proper divisors (5750233).

16722471 is a wasteful number, since it uses less digits than its factorization.

16722471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44021.

The product of its digits is 4704, while the sum is 30.

The square root of 16722471 is about 4089.3118002911. The cubic root of 16722471 is about 255.7212491174.

The spelling of 16722471 in words is "sixteen million, seven hundred twenty-two thousand, four hundred seventy-one".