521051051 has 2 divisors, whose sum is σ = 521051052. Its totient is φ = 521051050.

The previous prime is 521051029. The next prime is 521051087. The reversal of 521051051 is 150150125.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521051051 - 2¹⁸ = 520788907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (521051351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260525525 + 260525526.

It is an arithmetic number, because the mean of its divisors is an integer number (260525526).

Almost surely, 2^521051051 is an apocalyptic number.

521051051 is a deficient number, since it is larger than the sum of its proper divisors (1).

521051051 is an equidigital number, since it uses as much as digits as its factorization.

521051051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 521051051 is about 22826.5426860924. The cubic root of 521051051 is about 804.6865804050.

The spelling of 521051051 in words is "five hundred twenty-one million, fifty-one thousand, fifty-one".