2550521 has 8 divisors (see below), whose sum is σ = 2710920. Its totient is φ = 2395008.

The previous prime is 2550497. The next prime is 2550551. The reversal of 2550521 is 1250552.

It can be written as a sum of positive squares in 4 ways, for example, as 765625 + 1784896 = 875^2 + 1336^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2550521 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2550493 and 2550502.

It is not an unprimeable number, because it can be changed into a prime (2550551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116 + ... + 2261.

It is an arithmetic number, because the mean of its divisors is an integer number (338865).

2^2550521 is an apocalyptic number.

It is an amenable number.

2550521 is a deficient number, since it is larger than the sum of its proper divisors (160399).

2550521 is a wasteful number, since it uses less digits than its factorization.

2550521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443.

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

The square root of 2550521 is about 1597.0350653633. The cubic root of 2550521 is about 136.6290245992.

The spelling of 2550521 in words is "two million, five hundred fifty thousand, five hundred twenty-one".