51506022012 has 24 divisors (see below), whose sum is σ = 120608415312. Its totient is φ = 17107574400.

The previous prime is 51506021993. The next prime is 51506022031. The reversal of 51506022012 is 21022060515.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51506021993) and next prime (51506022031).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7633939 + ... + 7640682.

It is an arithmetic number, because the mean of its divisors is an integer number (5025350638).

Almost surely, 2^51506022012 is an apocalyptic number.

It is an amenable number.

51506022012 is an abundant number, since it is smaller than the sum of its proper divisors (69102393300).

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

51506022012 is a wasteful number, since it uses less digits than its factorization.

51506022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15274909 (or 15274907 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 51506022012 its reverse (21022060515), we get a palindrome (72528082527).

The spelling of 51506022012 in words is "fifty-one billion, five hundred six million, twenty-two thousand, twelve".