515145401 has 16 divisors (see below), whose sum is σ = 529514496. Its totient is φ = 501063696.

The previous prime is 515145359. The next prime is 515145431. The reversal of 515145401 is 104541515.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515145401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (515145431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2269250 + ... + 2269476.

It is an arithmetic number, because the mean of its divisors is an integer number (33094656).

Almost surely, 2^515145401 is an apocalyptic number.

It is an amenable number.

515145401 is a deficient number, since it is larger than the sum of its proper divisors (14369095).

515145401 is a wasteful number, since it uses less digits than its factorization.

515145401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 515145401 is about 22696.8147765276. The cubic root of 515145401 is about 801.6348863449.

Adding to 515145401 its reverse (104541515), we get a palindrome (619686916).

The spelling of 515145401 in words is "five hundred fifteen million, one hundred forty-five thousand, four hundred one".