51222453140 has 48 divisors (see below), whose sum is σ = 114361849728. Its totient is φ = 19228370304.

The previous prime is 51222453133. The next prime is 51222453151. The reversal of 51222453140 is 4135422215.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

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 in 15 ways as a sum of consecutive naturals, for example, 1026122 + ... + 1074881.

It is an arithmetic number, because the mean of its divisors is an integer number (2382538536).

Almost surely, 2^51222453140 is an apocalyptic number.

It is an amenable number.

51222453140 is an abundant number, since it is smaller than the sum of its proper divisors (63139396588).

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

51222453140 is a wasteful number, since it uses less digits than its factorization.

51222453140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101088 (or 2101086 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 51222453140 its reverse (4135422215), we get a palindrome (55357875355).

The spelling of 51222453140 in words is "fifty-one billion, two hundred twenty-two million, four hundred fifty-three thousand, one hundred forty".