51501322255121 has 4 divisors (see below), whose sum is σ = 51558104309232. Its totient is φ = 51444540201012.

The previous prime is 51501322255037. The next prime is 51501322255241. The reversal of 51501322255121 is 12155222310515.

It is a happy number.

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 51501322255121 - 2¹⁸ = 51501321992977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51501322251121) 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, 28391025695 + ... + 28391027508.

It is an arithmetic number, because the mean of its divisors is an integer number (12889526077308).

Almost surely, 2^{51501322255121} is an apocalyptic number.

It is an amenable number.

51501322255121 is a deficient number, since it is larger than the sum of its proper divisors (56782054111).

51501322255121 is an equidigital number, since it uses as much as digits as its factorization.

51501322255121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56782054110.

The product of its (nonzero) digits is 30000, while the sum is 35.

Adding to 51501322255121 its reverse (12155222310515), we get a palindrome (63656544565636).

The spelling of 51501322255121 in words is "fifty-one trillion, five hundred one billion, three hundred twenty-two million, two hundred fifty-five thousand, one hundred twenty-one".