515400001 has 2 divisors, whose sum is σ = 515400002. Its totient is φ = 515400000.

The previous prime is 515399959. The next prime is 515400007. The reversal of 515400001 is 100004515.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514200976 + 1199025 = 22676^2 + 1095^2 .

It is a cyclic number.

It is not a de Polignac number, because 515400001 - 2⁷ = 515399873 is a prime.

It is a super-2 number, since 2×515400001² = 531274322061600002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (515400007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257700000 + 257700001.

It is an arithmetic number, because the mean of its divisors is an integer number (257700001).

Almost surely, 2^515400001 is an apocalyptic number.

It is an amenable number.

515400001 is a deficient number, since it is larger than the sum of its proper divisors (1).

515400001 is an equidigital number, since it uses as much as digits as its factorization.

515400001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 515400001 is about 22702.4228002211. The cubic root of 515400001 is about 801.7669284359.

Adding to 515400001 its reverse (100004515), we get a palindrome (615404516).

The spelling of 515400001 in words is "five hundred fifteen million, four hundred thousand, one".