51444542 has 4 divisors (see below), whose sum is σ = 77166816. Its totient is φ = 25722270.

The previous prime is 51444527. The next prime is 51444559. The reversal of 51444542 is 24544415.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12861134 + ... + 12861137.

It is an arithmetic number, because the mean of its divisors is an integer number (19291704).

Almost surely, 2^51444542 is an apocalyptic number.

51444542 is a deficient number, since it is larger than the sum of its proper divisors (25722274).

51444542 is a wasteful number, since it uses less digits than its factorization.

51444542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25722273.

The product of its digits is 12800, while the sum is 29.

The square root of 51444542 is about 7172.4850644668. The cubic root of 51444542 is about 371.9173468430.

Adding to 51444542 its reverse (24544415), we get a palindrome (75988957).

The spelling of 51444542 in words is "fifty-one million, four hundred forty-four thousand, five hundred forty-two".