51606213543 has 24 divisors (see below), whose sum is σ = 76308495120. Its totient is φ = 33589664640.

The previous prime is 51606213541. The next prime is 51606213553. The reversal of 51606213543 is 34531260615.

51606213543 is a `hidden beast` number, since 5 + 1 + 606 + 2 + 1 + 3 + 5 + 43 = 666.

51606213543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51606213543 - 2¹ = 51606213541 is a prime.

It is a super-2 number, since 2×51606213543² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51606213498 and 51606213507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51606213541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 917353 + ... + 971981.

It is an arithmetic number, because the mean of its divisors is an integer number (3179520630).

Almost surely, 2^51606213543 is an apocalyptic number.

51606213543 is a deficient number, since it is larger than the sum of its proper divisors (24702281577).

51606213543 is a wasteful number, since it uses less digits than its factorization.

51606213543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57119 (or 57116 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 51606213543 in words is "fifty-one billion, six hundred six million, two hundred thirteen thousand, five hundred forty-three".