521610423 has 16 divisors (see below), whose sum is σ = 716000256. Its totient is φ = 337525920.

The previous prime is 521610367. The next prime is 521610469. The reversal of 521610423 is 324016125.

It is not a de Polignac number, because 521610423 - 2⁹ = 521609911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521610393 and 521610402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521610223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42390 + ... + 53292.

It is an arithmetic number, because the mean of its divisors is an integer number (44750016).

Almost surely, 2^521610423 is an apocalyptic number.

521610423 is a deficient number, since it is larger than the sum of its proper divisors (194389833).

521610423 is a wasteful number, since it uses less digits than its factorization.

521610423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11374.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 521610423 is about 22838.7920652560. The cubic root of 521610423 is about 804.9744333019.

Adding to 521610423 its reverse (324016125), we get a palindrome (845626548).

The spelling of 521610423 in words is "five hundred twenty-one million, six hundred ten thousand, four hundred twenty-three".