505033421 has 4 divisors (see below), whose sum is σ = 506387772. Its totient is φ = 503679072.

The previous prime is 505033351. The next prime is 505033423. The reversal of 505033421 is 124330505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 328515625 + 176517796 = 18125^2 + 13286^2 .

It is a cyclic number.

It is not a de Polignac number, because 505033421 - 2¹⁰ = 505032397 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 (505033423) 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, 676616 + ... + 677361.

It is an arithmetic number, because the mean of its divisors is an integer number (126596943).

Almost surely, 2^505033421 is an apocalyptic number.

It is an amenable number.

505033421 is a deficient number, since it is larger than the sum of its proper divisors (1354351).

505033421 is a wasteful number, since it uses less digits than its factorization.

505033421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354350.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 505033421 is about 22472.9486494318. The cubic root of 505033421 is about 796.3549910475.

Adding to 505033421 its reverse (124330505), we get a palindrome (629363926).

The spelling of 505033421 in words is "five hundred five million, thirty-three thousand, four hundred twenty-one".