501321361 has 4 divisors (see below), whose sum is σ = 501959152. Its totient is φ = 500683572.

The previous prime is 501321323. The next prime is 501321371. The reversal of 501321361 is 163123105.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 501321361 - 2²³ = 492932753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501321371) 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, 317715 + ... + 319288.

It is an arithmetic number, because the mean of its divisors is an integer number (125489788).

Almost surely, 2^501321361 is an apocalyptic number.

It is an amenable number.

501321361 is a deficient number, since it is larger than the sum of its proper divisors (637791).

501321361 is an equidigital number, since it uses as much as digits as its factorization.

501321361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637790.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 501321361 is about 22390.2068101212. The cubic root of 501321361 is about 794.3990875908.

Adding to 501321361 its reverse (163123105), we get a palindrome (664444466).

The spelling of 501321361 in words is "five hundred one million, three hundred twenty-one thousand, three hundred sixty-one".