525553 has 4 divisors (see below), whose sum is σ = 600640. Its totient is φ = 450468.

The previous prime is 525541. The next prime is 525571. The reversal of 525553 is 355525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 525553 - 2¹⁷ = 394481 is a prime.

It is a d-powerful number, because it can be written as 5² + 2¹⁷ + 5⁴ + 5⁵ + 5⁸ + 3⁴ .

It is a Duffinian number.

525553 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (525533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37533 + ... + 37546.

It is an arithmetic number, because the mean of its divisors is an integer number (150160).

2⁵²⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

525553 is a deficient number, since it is larger than the sum of its proper divisors (75087).

525553 is an equidigital number, since it uses as much as digits as its factorization.

525553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75086.

The product of its digits is 3750, while the sum is 25.

The square root of 525553 is about 724.9503431270. The cubic root of 525553 is about 80.6997469982.

It can be divided in two parts, 5 and 25553, that multiplied together give a triangular number (127765 = T₅₀₅).

The spelling of 525553 in words is "five hundred twenty-five thousand, five hundred fifty-three".