521480401 has 4 divisors (see below), whose sum is σ = 561594292. Its totient is φ = 481366512.

The previous prime is 521480359. The next prime is 521480411. The reversal of 521480401 is 104084125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 319158225 + 202322176 = 17865^2 + 14224^2 .

It is a cyclic number.

It is not a de Polignac number, because 521480401 - 2¹⁹ = 520956113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521480411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20056926 + ... + 20056951.

It is an arithmetic number, because the mean of its divisors is an integer number (140398573).

Almost surely, 2^521480401 is an apocalyptic number.

It is an amenable number.

521480401 is a deficient number, since it is larger than the sum of its proper divisors (40113891).

521480401 is a wasteful number, since it uses less digits than its factorization.

521480401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40113890.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 521480401 is about 22835.9453712782. The cubic root of 521480401 is about 804.9075423306.

The spelling of 521480401 in words is "five hundred twenty-one million, four hundred eighty thousand, four hundred one".