523553 has 2 divisors, whose sum is σ = 523554. Its totient is φ = 523552.

The previous prime is 523543. The next prime is 523571. The reversal of 523553 is 355325.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388129 + 135424 = 623^2 + 368^2 .

It is a cyclic number.

It is not a de Polignac number, because 523553 - 2⁶ = 523489 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (523543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261776 + 261777.

It is an arithmetic number, because the mean of its divisors is an integer number (261777).

2⁵²³⁵⁵³ is an apocalyptic number.

It is an amenable number.

523553 is a deficient number, since it is larger than the sum of its proper divisors (1).

523553 is an equidigital number, since it uses as much as digits as its factorization.

523553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 23.

The square root of 523553 is about 723.5696234641. The cubic root of 523553 is about 80.5972488270.

Adding to 523553 its reverse (355325), we get a palindrome (878878).

The spelling of 523553 in words is "five hundred twenty-three thousand, five hundred fifty-three".