2055521 has 16 divisors (see below), whose sum is σ = 2395008. Its totient is φ = 1747200.

The previous prime is 2055511. The next prime is 2055541. The reversal of 2055521 is 1255502.

It is a de Polignac number, because none of the positive numbers 2^k-2055521 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2055493 and 2055502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2055511) 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 15 ways as a sum of consecutive naturals, for example, 15626 + ... + 15756.

It is an arithmetic number, because the mean of its divisors is an integer number (149688).

2^2055521 is an apocalyptic number.

It is an amenable number.

2055521 is a deficient number, since it is larger than the sum of its proper divisors (339487).

2055521 is a wasteful number, since it uses less digits than its factorization.

2055521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 2055521 is about 1433.7088267846. The cubic root of 2055521 is about 127.1473479396.

The spelling of 2055521 in words is "two million, fifty-five thousand, five hundred twenty-one".