55521571 has 12 divisors (see below), whose sum is σ = 65309232. Its totient is φ = 46203696.

The previous prime is 55521547. The next prime is 55521577. The reversal of 55521571 is 17512555.

55521571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55521571 - 2⁷ = 55521443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55521577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119686 + ... + 120148.

It is an arithmetic number, because the mean of its divisors is an integer number (5442436).

Almost surely, 2^55521571 is an apocalyptic number.

55521571 is a deficient number, since it is larger than the sum of its proper divisors (9787661).

55521571 is an frugal number, since it uses more digits than its factorization.

55521571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 507 counting only the distinct ones).

The product of its digits is 8750, while the sum is 31.

The square root of 55521571 is about 7451.2798229566. The cubic root of 55521571 is about 381.4935931045.

The spelling of 55521571 in words is "fifty-five million, five hundred twenty-one thousand, five hundred seventy-one".