521300001 has 4 divisors (see below), whose sum is σ = 695066672. Its totient is φ = 347533332.

The previous prime is 521299981. The next prime is 521300057. The reversal of 521300001 is 100003125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 521300001 - 2⁹ = 521299489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521300001.

It is not an unprimeable number, because it can be changed into a prime (521310001) 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, 86883331 + ... + 86883336.

It is an arithmetic number, because the mean of its divisors is an integer number (173766668).

Almost surely, 2^521300001 is an apocalyptic number.

It is an amenable number.

521300001 is a deficient number, since it is larger than the sum of its proper divisors (173766671).

521300001 is a wasteful number, since it uses less digits than its factorization.

521300001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173766670.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 521300001 is about 22831.9951165026. The cubic root of 521300001 is about 804.8147155324.

Adding to 521300001 its reverse (100003125), we get a palindrome (621303126).

The spelling of 521300001 in words is "five hundred twenty-one million, three hundred thousand, one".