51541435571721 has 8 divisors (see below), whose sum is σ = 68977385896320. Its totient is φ = 34233221147472.

The previous prime is 51541435571719. The next prime is 51541435571723. The reversal of 51541435571721 is 12717553414515.

It is an interprime number because it is at equal distance from previous prime (51541435571719) and next prime (51541435571723).

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

It is not a de Polignac number, because 51541435571721 - 2¹ = 51541435571719 is a prime.

It is a super-2 number, since 2×51541435571721² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51541435571723) 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, 31933974145 + ... + 31933975758.

It is an arithmetic number, because the mean of its divisors is an integer number (8622173237040).

Almost surely, 2^{51541435571721} is an apocalyptic number.

It is an amenable number.

51541435571721 is a deficient number, since it is larger than the sum of its proper divisors (17435950324599).

51541435571721 is a wasteful number, since it uses less digits than its factorization.

51541435571721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63867950175.

The product of its digits is 2940000, while the sum is 51.

The spelling of 51541435571721 in words is "fifty-one trillion, five hundred forty-one billion, four hundred thirty-five million, five hundred seventy-one thousand, seven hundred twenty-one".