51033420502 has 4 divisors (see below), whose sum is σ = 76550130756. Its totient is φ = 25516710250.

The previous prime is 51033420467. The next prime is 51033420517. The reversal of 51033420502 is 20502433015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20502433015 = 5 ⋅4100486603.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12758355124 + ... + 12758355127.

It is an arithmetic number, because the mean of its divisors is an integer number (19137532689).

Almost surely, 2^51033420502 is an apocalyptic number.

51033420502 is a deficient number, since it is larger than the sum of its proper divisors (25516710254).

51033420502 is a wasteful number, since it uses less digits than its factorization.

51033420502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25516710253.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 51033420502 its reverse (20502433015), we get a palindrome (71535853517).

The spelling of 51033420502 in words is "fifty-one billion, thirty-three million, four hundred twenty thousand, five hundred two".