51543612 has 36 divisors (see below), whose sum is σ = 131518296. Its totient is φ = 17019360.

The previous prime is 51543559. The next prime is 51543617. The reversal of 51543612 is 21634515.

51543612 is a `hidden beast` number, since 5 + 1 + 5 + 43 + 612 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51543617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2839 + ... + 10542.

It is an arithmetic number, because the mean of its divisors is an integer number (3653286).

Almost surely, 2^51543612 is an apocalyptic number.

It is an amenable number.

51543612 is an abundant number, since it is smaller than the sum of its proper divisors (79974684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51543612 is a wasteful number, since it uses less digits than its factorization.

51543612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13498 (or 13493 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51543612 is about 7179.3879962013. The cubic root of 51543612 is about 372.1559353195.

The spelling of 51543612 in words is "fifty-one million, five hundred forty-three thousand, six hundred twelve".