51041051510521 has 4 divisors (see below), whose sum is σ = 51802858249552. Its totient is φ = 50279244771492.

The previous prime is 51041051510479. The next prime is 51041051510557. The reversal of 51041051510521 is 12501515014015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51041051510521 - 2¹⁷ = 51041051379449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51041051210521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380903369415 + ... + 380903369548.

It is an arithmetic number, because the mean of its divisors is an integer number (12950714562388).

Almost surely, 2^{51041051510521} is an apocalyptic number.

It is an amenable number.

51041051510521 is a deficient number, since it is larger than the sum of its proper divisors (761806739031).

51041051510521 is an equidigital number, since it uses as much as digits as its factorization.

51041051510521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761806739030.

The product of its (nonzero) digits is 5000, while the sum is 31.

Adding to 51041051510521 its reverse (12501515014015), we get a palindrome (63542566524536).

The spelling of 51041051510521 in words is "fifty-one trillion, forty-one billion, fifty-one million, five hundred ten thousand, five hundred twenty-one".