5521601 has 4 divisors (see below), whose sum is σ = 5526612. Its totient is φ = 5516592.

The previous prime is 5521597. The next prime is 5521603. The reversal of 5521601 is 1061255.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2958400 + 2563201 = 1720^2 + 1601^2 .

It is a cyclic number.

It is not a de Polignac number, because 5521601 - 2² = 5521597 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5521603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50 + ... + 3323.

It is an arithmetic number, because the mean of its divisors is an integer number (1381653).

Almost surely, 2^5521601 is an apocalyptic number.

It is an amenable number.

5521601 is a deficient number, since it is larger than the sum of its proper divisors (5011).

5521601 is a wasteful number, since it uses less digits than its factorization.

5521601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 5521601 is about 2349.8087156192. The cubic root of 5521601 is about 176.7482029390.

Adding to 5521601 its reverse (1061255), we get a palindrome (6582856).

The spelling of 5521601 in words is "five million, five hundred twenty-one thousand, six hundred one".