552117521 has 4 divisors (see below), whose sum is σ = 565583844. Its totient is φ = 538651200.

The previous prime is 552117479. The next prime is 552117583. The reversal of 552117521 is 125711255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125711255 = 5 ⋅25142251.

It can be written as a sum of positive squares in 2 ways, for example, as 33189121 + 518928400 = 5761^2 + 22780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-552117521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (552117121) 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 3 ways as a sum of consecutive naturals, for example, 6733100 + ... + 6733181.

It is an arithmetic number, because the mean of its divisors is an integer number (141395961).

Almost surely, 2^552117521 is an apocalyptic number.

It is an amenable number.

552117521 is a deficient number, since it is larger than the sum of its proper divisors (13466323).

552117521 is a wasteful number, since it uses less digits than its factorization.

552117521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13466322.

The product of its digits is 3500, while the sum is 29.

The square root of 552117521 is about 23497.1811288078. The cubic root of 552117521 is about 820.3713968011.

Adding to 552117521 its reverse (125711255), we get a palindrome (677828776).

The spelling of 552117521 in words is "five hundred fifty-two million, one hundred seventeen thousand, five hundred twenty-one".