51012420252 has 48 divisors (see below), whose sum is σ = 122613523200. Its totient is φ = 16496698240.

The previous prime is 51012420247. The next prime is 51012420289. The reversal of 51012420252 is 25202421015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201552 + ... + 377687.

It is an arithmetic number, because the mean of its divisors is an integer number (2554448400).

Almost surely, 2^51012420252 is an apocalyptic number.

It is an amenable number.

51012420252 is an abundant number, since it is smaller than the sum of its proper divisors (71601102948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51012420252 is a wasteful number, since it uses less digits than its factorization.

51012420252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579466 (or 579464 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 51012420252 its reverse (25202421015), we get a palindrome (76214841267).

The spelling of 51012420252 in words is "fifty-one billion, twelve million, four hundred twenty thousand, two hundred fifty-two".