17420231 has 4 divisors (see below), whose sum is σ = 17488272. Its totient is φ = 17352192.

The previous prime is 17420191. The next prime is 17420243. The reversal of 17420231 is 13202471.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17420231 - 2⁶ = 17420167 is a prime.

It is a super-2 number, since 2×17420231² = 606928896186722, which contains 22 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 (17420831) 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, 33635 + ... + 34148.

It is an arithmetic number, because the mean of its divisors is an integer number (4372068).

Almost surely, 2^17420231 is an apocalyptic number.

17420231 is a deficient number, since it is larger than the sum of its proper divisors (68041).

17420231 is an equidigital number, since it uses as much as digits as its factorization.

17420231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68040.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 17420231 is about 4173.7550239562. The cubic root of 17420231 is about 259.2296279496.

The spelling of 17420231 in words is "seventeen million, four hundred twenty thousand, two hundred thirty-one".