51442562 has 4 divisors (see below), whose sum is σ = 77163846. Its totient is φ = 25721280.

The previous prime is 51442511. The next prime is 51442579. The reversal of 51442562 is 26524415.

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., 51423241 + 19321 = 7171^2 + 139^2 .

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 as a sum of consecutive naturals, namely, 12860639 + ... + 12860642.

Almost surely, 2^51442562 is an apocalyptic number.

51442562 is a deficient number, since it is larger than the sum of its proper divisors (25721284).

51442562 is a wasteful number, since it uses less digits than its factorization.

51442562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25721283.

The product of its digits is 9600, while the sum is 29.

The square root of 51442562 is about 7172.3470356641. The cubic root of 51442562 is about 371.9125753242.

Adding to 51442562 its reverse (26524415), we get a palindrome (77966977).

The spelling of 51442562 in words is "fifty-one million, four hundred forty-two thousand, five hundred sixty-two".