505522121 has 8 divisors (see below), whose sum is σ = 544604424. Its totient is φ = 466467840.

The previous prime is 505522093. The next prime is 505522133. The reversal of 505522121 is 121225505.

It can be written as a sum of positive squares in 4 ways, for example, as 119596096 + 385926025 = 10936^2 + 19645^2 .

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 505522121 - 2¹⁸ = 505259977 is a prime.

It is a super-2 number, since 2×505522121² = 511105229640677282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (505522181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44585 + ... + 54761.

It is an arithmetic number, because the mean of its divisors is an integer number (68075553).

Almost surely, 2^505522121 is an apocalyptic number.

It is an amenable number.

505522121 is a deficient number, since it is larger than the sum of its proper divisors (39082303).

505522121 is a wasteful number, since it uses less digits than its factorization.

505522121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14011.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 505522121 is about 22483.8190928499. The cubic root of 505522121 is about 796.6117748594.

Adding to 505522121 its reverse (121225505), we get a palindrome (626747626).

The spelling of 505522121 in words is "five hundred five million, five hundred twenty-two thousand, one hundred twenty-one".