51204213636513 has 8 divisors (see below), whose sum is σ = 78025468398528. Its totient is φ = 29259550649424.

The previous prime is 51204213636497. The next prime is 51204213636517. The reversal of 51204213636513 is 31563631240215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51204213636513 - 2⁴ = 51204213636497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51204213636517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1219147943706 + ... + 1219147943747.

It is an arithmetic number, because the mean of its divisors is an integer number (9753183549816).

Almost surely, 2^{51204213636513} is an apocalyptic number.

It is an amenable number.

51204213636513 is a deficient number, since it is larger than the sum of its proper divisors (26821254762015).

51204213636513 is a wasteful number, since it uses less digits than its factorization.

51204213636513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438295887463.

The product of its (nonzero) digits is 388800, while the sum is 42.

Adding to 51204213636513 its reverse (31563631240215), we get a palindrome (82767844876728).

The spelling of 51204213636513 in words is "fifty-one trillion, two hundred four billion, two hundred thirteen million, six hundred thirty-six thousand, five hundred thirteen".