51040044502 has 8 divisors (see below), whose sum is σ = 76562488656. Its totient is φ = 25519214952.

The previous prime is 51040044499. The next prime is 51040044509. The reversal of 51040044502 is 20544004015.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51040044502² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51040044509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321258 + ... + 453085.

It is an arithmetic number, because the mean of its divisors is an integer number (9570311082).

Almost surely, 2^51040044502 is an apocalyptic number.

51040044502 is a deficient number, since it is larger than the sum of its proper divisors (25522444154).

51040044502 is a wasteful number, since it uses less digits than its factorization.

51040044502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807302.

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

Adding to 51040044502 its reverse (20544004015), we get a palindrome (71584048517).

The spelling of 51040044502 in words is "fifty-one billion, forty million, forty-four thousand, five hundred two".