521030401 has 8 divisors (see below), whose sum is σ = 528825024. Its totient is φ = 513290160.

The previous prime is 521030387. The next prime is 521030413. The reversal of 521030401 is 104030125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521030401 - 2¹³ = 521022209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521030491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5916 + ... + 32818.

It is an arithmetic number, because the mean of its divisors is an integer number (66103128).

Almost surely, 2^521030401 is an apocalyptic number.

It is an amenable number.

521030401 is a deficient number, since it is larger than the sum of its proper divisors (7794623).

521030401 is a wasteful number, since it uses less digits than its factorization.

521030401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27191.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 521030401 is about 22826.0903573082. The cubic root of 521030401 is about 804.6759499704.

Adding to 521030401 its reverse (104030125), we get a palindrome (625060526).

The spelling of 521030401 in words is "five hundred twenty-one million, thirty thousand, four hundred one".