515442001 has 2 divisors, whose sum is σ = 515442002. Its totient is φ = 515442000.

The previous prime is 515441999. The next prime is 515442007. The reversal of 515442001 is 100244515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423742225 + 91699776 = 20585^2 + 9576^2 .

It is a cyclic number.

It is not a de Polignac number, because 515442001 - 2¹ = 515441999 is a prime.

Together with 515441999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (515442007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257721000 + 257721001.

It is an arithmetic number, because the mean of its divisors is an integer number (257721001).

Almost surely, 2^515442001 is an apocalyptic number.

It is an amenable number.

515442001 is a deficient number, since it is larger than the sum of its proper divisors (1).

515442001 is an equidigital number, since it uses as much as digits as its factorization.

515442001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 515442001 is about 22703.3477927816. The cubic root of 515442001 is about 801.7887065346.

Adding to 515442001 its reverse (100244515), we get a palindrome (615686516).

The spelling of 515442001 in words is "five hundred fifteen million, four hundred forty-two thousand, one".