51286542 has 16 divisors (see below), whose sum is σ = 103168080. Its totient is φ = 16996352.

The previous prime is 51286523. The next prime is 51286559. The reversal of 51286542 is 24568215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23667 + ... + 25742.

It is an arithmetic number, because the mean of its divisors is an integer number (6448005).

Almost surely, 2^51286542 is an apocalyptic number.

51286542 is an abundant number, since it is smaller than the sum of its proper divisors (51881538).

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

51286542 is a wasteful number, since it uses less digits than its factorization.

51286542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49587.

The product of its digits is 19200, while the sum is 33.

The square root of 51286542 is about 7161.4622808474. The cubic root of 51286542 is about 371.5362037045.

The spelling of 51286542 in words is "fifty-one million, two hundred eighty-six thousand, five hundred forty-two".