521051 has 2 divisors, whose sum is σ = 521052. Its totient is φ = 521050.

The previous prime is 521047. The next prime is 521063. The reversal of 521051 is 150125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521051 - 2² = 521047 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521051.

It is not a weakly prime, because it can be changed into another prime (521021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260525 + 260526.

It is an arithmetic number, because the mean of its divisors is an integer number (260526).

2⁵²¹⁰⁵¹ is an apocalyptic number.

521051 is a deficient number, since it is larger than the sum of its proper divisors (1).

521051 is an equidigital number, since it uses as much as digits as its factorization.

521051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 521051 is about 721.8386246246. The cubic root of 521051 is about 80.4686554151.

Adding to 521051 its reverse (150125), we get a palindrome (671176).

The spelling of 521051 in words is "five hundred twenty-one thousand, fifty-one".