51444502 has 4 divisors (see below), whose sum is σ = 77166756. Its totient is φ = 25722250.

The previous prime is 51444443. The next prime is 51444509. The reversal of 51444502 is 20544415.

It is a happy number.

51444502 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 is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51444509) 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, 12861124 + ... + 12861127.

It is an arithmetic number, because the mean of its divisors is an integer number (19291689).

Almost surely, 2^51444502 is an apocalyptic number.

51444502 is a deficient number, since it is larger than the sum of its proper divisors (25722254).

51444502 is a wasteful number, since it uses less digits than its factorization.

51444502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25722253.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 51444502 is about 7172.4822760325. The cubic root of 51444502 is about 371.9172504499.

Adding to 51444502 its reverse (20544415), we get a palindrome (71988917).

The spelling of 51444502 in words is "fifty-one million, four hundred forty-four thousand, five hundred two".