524040321 has 16 divisors (see below), whose sum is σ = 799248384. Its totient is φ = 299185104.

The previous prime is 524040313. The next prime is 524040331. The reversal of 524040321 is 123040425.

It is not a de Polignac number, because 524040321 - 2³ = 524040313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (524040331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14416 + ... + 35438.

It is an arithmetic number, because the mean of its divisors is an integer number (49953024).

Almost surely, 2^524040321 is an apocalyptic number.

It is an amenable number.

524040321 is a deficient number, since it is larger than the sum of its proper divisors (275208063).

524040321 is a wasteful number, since it uses less digits than its factorization.

524040321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22220.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 524040321 is about 22891.9269831091. The cubic root of 524040321 is about 806.2224760269. Note that the first 3 decimals are identical.

Adding to 524040321 its reverse (123040425), we get a palindrome (647080746).

The spelling of 524040321 in words is "five hundred twenty-four million, forty thousand, three hundred twenty-one".