521365051 has 8 divisors (see below), whose sum is σ = 530128304. Its totient is φ = 512645760.

The previous prime is 521365049. The next prime is 521365063. The reversal of 521365051 is 150563125.

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 521365051 - 2¹ = 521365049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521365001) 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 7 ways as a sum of consecutive naturals, for example, 13375 + ... + 34951.

It is an arithmetic number, because the mean of its divisors is an integer number (66266038).

Almost surely, 2^521365051 is an apocalyptic number.

521365051 is a deficient number, since it is larger than the sum of its proper divisors (8763253).

521365051 is a wasteful number, since it uses less digits than its factorization.

521365051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21981.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 521365051 is about 22833.4196081095. The cubic root of 521365051 is about 804.8481901917.

The spelling of 521365051 in words is "five hundred twenty-one million, three hundred sixty-five thousand, fifty-one".