501540343 has 4 divisors (see below), whose sum is σ = 506710960. Its totient is φ = 496369728.

The previous prime is 501540317. The next prime is 501540349. The reversal of 501540343 is 343045105.

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 501540343 - 2⁵ = 501540311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501540349) 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, 2585163 + ... + 2585356.

It is an arithmetic number, because the mean of its divisors is an integer number (126677740).

Almost surely, 2^501540343 is an apocalyptic number.

501540343 is a deficient number, since it is larger than the sum of its proper divisors (5170617).

501540343 is an equidigital number, since it uses as much as digits as its factorization.

501540343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170616.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 501540343 is about 22395.0964052401. The cubic root of 501540343 is about 794.5147378115.

Adding to 501540343 its reverse (343045105), we get a palindrome (844585448).

The spelling of 501540343 in words is "five hundred one million, five hundred forty thousand, three hundred forty-three".