51736042 has 4 divisors (see below), whose sum is σ = 77604066. Its totient is φ = 25868020.

The previous prime is 51736021. The next prime is 51736043. The reversal of 51736042 is 24063715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26122321 + 25613721 = 5111^2 + 5061^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51736042.

It is not an unprimeable number, because it can be changed into a prime (51736043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12934009 + ... + 12934012.

Almost surely, 2^51736042 is an apocalyptic number.

51736042 is a deficient number, since it is larger than the sum of its proper divisors (25868024).

51736042 is a wasteful number, since it uses less digits than its factorization.

51736042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25868023.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 51736042 is about 7192.7770714794. Note that the first 3 decimals coincide. The cubic root of 51736042 is about 372.6184887986.

Adding to 51736042 its reverse (24063715), we get a palindrome (75799757).

The spelling of 51736042 in words is "fifty-one million, seven hundred thirty-six thousand, forty-two".