51541505021 has 8 divisors (see below), whose sum is σ = 51599808000. Its totient is φ = 51483237520.

The previous prime is 51541505003. The next prime is 51541505027. The reversal of 51541505021 is 12050514515.

51541505021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51541505021 - 2¹⁰ = 51541503997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51541505027) 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, 3733151 + ... + 3746931.

It is an arithmetic number, because the mean of its divisors is an integer number (6449976000).

Almost surely, 2^51541505021 is an apocalyptic number.

It is an amenable number.

51541505021 is a deficient number, since it is larger than the sum of its proper divisors (58302979).

51541505021 is a wasteful number, since it uses less digits than its factorization.

51541505021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17739.

The product of its (nonzero) digits is 5000, while the sum is 29.

The spelling of 51541505021 in words is "fifty-one billion, five hundred forty-one million, five hundred five thousand, twenty-one".