51542042 has 8 divisors (see below), whose sum is σ = 77344032. Its totient is φ = 25760700.

The previous prime is 51542027. The next prime is 51542047. The reversal of 51542042 is 24024515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51541999 and 51542017.

It is not an unprimeable number, because it can be changed into a prime (51542047) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5417 + ... + 11507.

It is an arithmetic number, because the mean of its divisors is an integer number (9668004).

Almost surely, 2^51542042 is an apocalyptic number.

51542042 is a deficient number, since it is larger than the sum of its proper divisors (25801990).

51542042 is a wasteful number, since it uses less digits than its factorization.

51542042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10324.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 51542042 is about 7179.2786545725. The cubic root of 51542042 is about 372.1521567022.

Adding to 51542042 its reverse (24024515), we get a palindrome (75566557).

The spelling of 51542042 in words is "fifty-one million, five hundred forty-two thousand, forty-two".