5551521 has 8 divisors (see below), whose sum is σ = 7455840. Its totient is φ = 3674112.

The previous prime is 5551501. The next prime is 5551529. The reversal of 5551521 is 1251555.

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

It is not a de Polignac number, because 5551521 - 2⁵ = 5551489 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 5551491 and 5551500.

It is not an unprimeable number, because it can be changed into a prime (5551529) 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, 6240 + ... + 7073.

It is an arithmetic number, because the mean of its divisors is an integer number (931980).

Almost surely, 2^5551521 is an apocalyptic number.

It is an amenable number.

5551521 is a deficient number, since it is larger than the sum of its proper divisors (1904319).

5551521 is a wasteful number, since it uses less digits than its factorization.

5551521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13455.

The product of its digits is 1250, while the sum is 24.

The square root of 5551521 is about 2356.1665900356. The cubic root of 5551521 is about 177.0668775974.

The spelling of 5551521 in words is "five million, five hundred fifty-one thousand, five hundred twenty-one".