501021343 has 2 divisors, whose sum is σ = 501021344. Its totient is φ = 501021342.

The previous prime is 501021299. The next prime is 501021347. The reversal of 501021343 is 343120105.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501021343 is a prime.

It is a super-2 number, since 2×501021343² = 502044772283047298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 501021343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501021347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250510671 + 250510672.

It is an arithmetic number, because the mean of its divisors is an integer number (250510672).

Almost surely, 2^501021343 is an apocalyptic number.

501021343 is a deficient number, since it is larger than the sum of its proper divisors (1).

501021343 is an equidigital number, since it uses as much as digits as its factorization.

501021343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 501021343 is about 22383.5060479810. The cubic root of 501021343 is about 794.2405854111.

Adding to 501021343 its reverse (343120105), we get a palindrome (844141448).

The spelling of 501021343 in words is "five hundred one million, twenty-one thousand, three hundred forty-three".