520135531001 has 2 divisors, whose sum is σ = 520135531002. Its totient is φ = 520135531000.

The previous prime is 520135530989. The next prime is 520135531031. The reversal of 520135531001 is 100135531025.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 494315861776 + 25819669225 = 703076^2 + 160685^2 .

It is a cyclic number.

It is not a de Polignac number, because 520135531001 - 2¹⁴ = 520135514617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (520135531031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260067765500 + 260067765501.

It is an arithmetic number, because the mean of its divisors is an integer number (260067765501).

Almost surely, 2^520135531001 is an apocalyptic number.

It is an amenable number.

520135531001 is a deficient number, since it is larger than the sum of its proper divisors (1).

520135531001 is an equidigital number, since it uses as much as digits as its factorization.

520135531001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 26.

The spelling of 520135531001 in words is "five hundred twenty billion, one hundred thirty-five million, five hundred thirty-one thousand, one".