513525615451 has 8 divisors (see below), whose sum is σ = 526363640208. Its totient is φ = 501000533200.

The previous prime is 513525615367. The next prime is 513525615457. The reversal of 513525615451 is 154516525315.

It is a happy number.

It is not a de Polignac number, because 513525615451 - 2²³ = 513517226843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513525615398 and 513525615407.

It is not an unprimeable number, because it can be changed into a prime (513525615457) 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 7 ways as a sum of consecutive naturals, for example, 3656545 + ... + 3794386.

It is an arithmetic number, because the mean of its divisors is an integer number (65795455026).

Almost surely, 2^513525615451 is an apocalyptic number.

513525615451 is a deficient number, since it is larger than the sum of its proper divisors (12838024757).

513525615451 is an frugal number, since it uses more digits than its factorization.

513525615451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451054 (or 7450972 counting only the distinct ones).

The product of its digits is 450000, while the sum is 43.

The spelling of 513525615451 in words is "five hundred thirteen billion, five hundred twenty-five million, six hundred fifteen thousand, four hundred fifty-one".