51504104251 has 8 divisors (see below), whose sum is σ = 54243829520. Its totient is φ = 48767277312.

The previous prime is 51504104243. The next prime is 51504104257. The reversal of 51504104251 is 15240140515.

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

It is a cyclic number.

It is not a de Polignac number, because 51504104251 - 2³ = 51504104243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51504104257) 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, 688050 + ... + 759223.

It is an arithmetic number, because the mean of its divisors is an integer number (6780478690).

Almost surely, 2^51504104251 is an apocalyptic number.

51504104251 is a deficient number, since it is larger than the sum of its proper divisors (2739725269).

51504104251 is a wasteful number, since it uses less digits than its factorization.

51504104251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449165.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 51504104251 its reverse (15240140515), we get a palindrome (66744244766).

The spelling of 51504104251 in words is "fifty-one billion, five hundred four million, one hundred four thousand, two hundred fifty-one".