523421145 has 48 divisors (see below), whose sum is σ = 1010777040. Its totient is φ = 248790528.

The previous prime is 523421141. The next prime is 523421149. The reversal of 523421145 is 541124325.

It is an interprime number because it is at equal distance from previous prime (523421141) and next prime (523421149).

It can be written as a sum of positive squares in 8 ways, for example, as 112021056 + 411400089 = 10584^2 + 20283^2 .

It is not a de Polignac number, because 523421145 - 2² = 523421141 is a prime.

It is a super-2 number, since 2×523421145² = 547939390066222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (523421141) 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 47 ways as a sum of consecutive naturals, for example, 1539 + ... + 32391.

It is an arithmetic number, because the mean of its divisors is an integer number (21057855).

Almost surely, 2^523421145 is an apocalyptic number.

It is an amenable number.

523421145 is a deficient number, since it is larger than the sum of its proper divisors (487355895).

523421145 is a wasteful number, since it uses less digits than its factorization.

523421145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30906 (or 30903 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 523421145 is about 22878.3990917197. The cubic root of 523421145 is about 805.9048221346.

The spelling of 523421145 in words is "five hundred twenty-three million, four hundred twenty-one thousand, one hundred forty-five".