523310621 has 2 divisors, whose sum is σ = 523310622. Its totient is φ = 523310620.

The previous prime is 523310587. The next prime is 523310633. The reversal of 523310621 is 126013325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 443565721 + 79744900 = 21061^2 + 8930^2 .

It is a cyclic number.

It is not a de Polignac number, because 523310621 - 2¹⁴ = 523294237 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523310321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261655310 + 261655311.

It is an arithmetic number, because the mean of its divisors is an integer number (261655311).

Almost surely, 2^523310621 is an apocalyptic number.

It is an amenable number.

523310621 is a deficient number, since it is larger than the sum of its proper divisors (1).

523310621 is an equidigital number, since it uses as much as digits as its factorization.

523310621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 523310621 is about 22875.9834979832. The cubic root of 523310621 is about 805.8480940132.

Adding to 523310621 its reverse (126013325), we get a palindrome (649323946).

The spelling of 523310621 in words is "five hundred twenty-three million, three hundred ten thousand, six hundred twenty-one".