51821049337 has 8 divisors (see below), whose sum is σ = 53226837576. Its totient is φ = 50415535872.

The previous prime is 51821049233. The next prime is 51821049359. The reversal of 51821049337 is 73394012815.

51821049337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 33896123881 + 17924925456 = 184109^2 + 133884^2 .

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 51821049337 - 2³⁵ = 17461310969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51821049293 and 51821049302.

It is not an unprimeable number, because it can be changed into a prime (51821049377) 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, 347313 + ... + 473569.

It is an arithmetic number, because the mean of its divisors is an integer number (6653354697).

Almost surely, 2^51821049337 is an apocalyptic number.

It is an amenable number.

51821049337 is a deficient number, since it is larger than the sum of its proper divisors (1405788239).

51821049337 is a wasteful number, since it uses less digits than its factorization.

51821049337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137387.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 51821049337 in words is "fifty-one billion, eight hundred twenty-one million, forty-nine thousand, three hundred thirty-seven".