515401441 has 2 divisors, whose sum is σ = 515401442. Its totient is φ = 515401440.

The previous prime is 515401423. The next prime is 515401477. The reversal of 515401441 is 144104515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376515216 + 138886225 = 19404^2 + 11785^2 .

It is a cyclic number.

It is not a de Polignac number, because 515401441 - 2⁵ = 515401409 is a prime.

It is not a weakly prime, because it can be changed into another prime (515401241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257700720 + 257700721.

It is an arithmetic number, because the mean of its divisors is an integer number (257700721).

Almost surely, 2^515401441 is an apocalyptic number.

It is an amenable number.

515401441 is a deficient number, since it is larger than the sum of its proper divisors (1).

515401441 is an equidigital number, since it uses as much as digits as its factorization.

515401441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 515401441 is about 22702.4545148757. The cubic root of 515401441 is about 801.7676751332.

Adding to 515401441 its reverse (144104515), we get a palindrome (659505956).

It can be divided in two parts, 515 and 401441, that added together give a square (401956 = 634²).

The spelling of 515401441 in words is "five hundred fifteen million, four hundred one thousand, four hundred forty-one".