523220069 has 2 divisors, whose sum is σ = 523220070. Its totient is φ = 523220068.

The previous prime is 523220041. The next prime is 523220107. The reversal of 523220069 is 960022325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296356225 + 226863844 = 17215^2 + 15062^2 .

It is a cyclic number.

It is not a de Polignac number, because 523220069 - 2⁸ = 523219813 is a prime.

It is a super-2 number, since 2×523220069² = 547518481208729522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523220669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261610034 + 261610035.

It is an arithmetic number, because the mean of its divisors is an integer number (261610035).

Almost surely, 2^523220069 is an apocalyptic number.

It is an amenable number.

523220069 is a deficient number, since it is larger than the sum of its proper divisors (1).

523220069 is an equidigital number, since it uses as much as digits as its factorization.

523220069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 523220069 is about 22874.0042187633. The cubic root of 523220069 is about 805.8016108711.

The spelling of 523220069 in words is "five hundred twenty-three million, two hundred twenty thousand, sixty-nine".