2521553 has 4 divisors (see below), whose sum is σ = 2525028. Its totient is φ = 2518080.

The previous prime is 2521537. The next prime is 2521591. The reversal of 2521553 is 3551252.

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 1423249 + 1098304 = 1193^2 + 1048^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521553 - 2⁴ = 2521537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188 + ... + 2253.

It is an arithmetic number, because the mean of its divisors is an integer number (631257).

2^2521553 is an apocalyptic number.

It is an amenable number.

2521553 is a deficient number, since it is larger than the sum of its proper divisors (3475).

2521553 is a wasteful number, since it uses less digits than its factorization.

2521553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474.

The product of its digits is 1500, while the sum is 23.

The square root of 2521553 is about 1587.9398603222. The cubic root of 2521553 is about 136.1097909570.

The spelling of 2521553 in words is "two million, five hundred twenty-one thousand, five hundred fifty-three".