220402543 has 2 divisors, whose sum is σ = 220402544. Its totient is φ = 220402542.

The previous prime is 220402499. The next prime is 220402561. The reversal of 220402543 is 345204022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220402543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220402573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110201271 + 110201272.

It is an arithmetic number, because the mean of its divisors is an integer number (110201272).

Almost surely, 2^220402543 is an apocalyptic number.

220402543 is a deficient number, since it is larger than the sum of its proper divisors (1).

220402543 is an equidigital number, since it uses as much as digits as its factorization.

220402543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 220402543 is about 14845.9604943567. The cubic root of 220402543 is about 604.0490426605.

Adding to 220402543 its reverse (345204022), we get a palindrome (565606565).

The spelling of 220402543 in words is "two hundred twenty million, four hundred two thousand, five hundred forty-three".