17431 has 2 divisors, whose sum is σ = 17432. Its totient is φ = 17430.

The previous prime is 17419. The next prime is 17443. The reversal of 17431 is 13471.

It is a balanced prime because it is at equal distance from previous prime (17419) and next prime (17443).

It is a cyclic number.

It is not a de Polignac number, because 17431 - 2¹¹ = 15383 is a prime.

It is a super-2 number, since 2×17431² = 607679522, which contains 22 as substring.

17431 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8715 + 8716.

It is an arithmetic number, because the mean of its divisors is an integer number (8716).

2¹⁷⁴³¹ is an apocalyptic number.

17431 is the 84-th centered pentagonal number.

17431 is a deficient number, since it is larger than the sum of its proper divisors (1).

17431 is an equidigital number, since it uses as much as digits as its factorization.

17431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84, while the sum is 16.

The square root of 17431 is about 132.0265124890. The cubic root of 17431 is about 25.9283034605.

The spelling of 17431 in words is "seventeen thousand, four hundred thirty-one".