521104253 has 2 divisors, whose sum is σ = 521104254. Its totient is φ = 521104252.

The previous prime is 521104237. The next prime is 521104271. The reversal of 521104253 is 352401125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418325209 + 102779044 = 20453^2 + 10138^2 .

It is a cyclic number.

It is not a de Polignac number, because 521104253 - 2⁴ = 521104237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521104153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260552126 + 260552127.

It is an arithmetic number, because the mean of its divisors is an integer number (260552127).

Almost surely, 2^521104253 is an apocalyptic number.

It is an amenable number.

521104253 is a deficient number, since it is larger than the sum of its proper divisors (1).

521104253 is an equidigital number, since it uses as much as digits as its factorization.

521104253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 521104253 is about 22827.7080102230. The cubic root of 521104253 is about 804.7139670231.

Adding to 521104253 its reverse (352401125), we get a palindrome (873505378).

The spelling of 521104253 in words is "five hundred twenty-one million, one hundred four thousand, two hundred fifty-three".