17220131 has 4 divisors (see below), whose sum is σ = 17230752. Its totient is φ = 17209512.

The previous prime is 17220109. The next prime is 17220157. The reversal of 17220131 is 13102271.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 17220131 - 2¹⁸ = 16957987 is a prime.

It is a super-2 number, since 2×17220131² = 593065823314322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17220101) 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, 2315 + ... + 6308.

It is an arithmetic number, because the mean of its divisors is an integer number (4307688).

Almost surely, 2^17220131 is an apocalyptic number.

17220131 is a deficient number, since it is larger than the sum of its proper divisors (10621).

17220131 is an equidigital number, since it uses as much as digits as its factorization.

17220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10620.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 17220131 is about 4149.7145684975. The cubic root of 17220131 is about 258.2332435937.

The spelling of 17220131 in words is "seventeen million, two hundred twenty thousand, one hundred thirty-one".