505440001 has 8 divisors (see below), whose sum is σ = 555357600. Its totient is φ = 456183840.

The previous prime is 505439993. The next prime is 505440007. The reversal of 505440001 is 100044505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505440001 - 2³ = 505439993 is a prime.

It is a super-2 number, since 2×505440001² = 510939189221760002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505440007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163756 + ... + 166813.

It is an arithmetic number, because the mean of its divisors is an integer number (69419700).

Almost surely, 2^505440001 is an apocalyptic number.

It is an amenable number.

505440001 is a deficient number, since it is larger than the sum of its proper divisors (49917599).

505440001 is a wasteful number, since it uses less digits than its factorization.

505440001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330719.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 505440001 is about 22481.9928164743. The cubic root of 505440001 is about 796.5686370824.

Adding to 505440001 its reverse (100044505), we get a palindrome (605484506).

It can be divided in two parts, 50 and 5440001, that added together give a triangular number (5440051 = T₃₂₉₈).

The spelling of 505440001 in words is "five hundred five million, four hundred forty thousand, one".