51525242 has 4 divisors (see below), whose sum is σ = 77287866. Its totient is φ = 25762620.

The previous prime is 51525239. The next prime is 51525247. The reversal of 51525242 is 24252515.

51525242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 37319881 + 14205361 = 6109^2 + 3769^2 .

It is not an unprimeable number, because it can be changed into a prime (51525247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12881309 + ... + 12881312.

Almost surely, 2^51525242 is an apocalyptic number.

51525242 is a deficient number, since it is larger than the sum of its proper divisors (25762624).

51525242 is a wasteful number, since it uses less digits than its factorization.

51525242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25762623.

The product of its digits is 4000, while the sum is 26.

The square root of 51525242 is about 7178.1085252314. The cubic root of 51525242 is about 372.1117182859. Note that the first 3 decimals are identical.

Adding to 51525242 its reverse (24252515), we get a palindrome (75777757).

The spelling of 51525242 in words is "fifty-one million, five hundred twenty-five thousand, two hundred forty-two".