51143352220020 has 24 divisors (see below), whose sum is σ = 143201386216224. Its totient is φ = 13638227258656.

The previous prime is 51143352219989. The next prime is 51143352220033. The reversal of 51143352220020 is 2002225334115.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 51143352220020.

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, 426194601774 + ... + 426194601893.

It is an arithmetic number, because the mean of its divisors is an integer number (5966724425676).

Almost surely, 2^{51143352220020} is an apocalyptic number.

It is an amenable number.

51143352220020 is an abundant number, since it is smaller than the sum of its proper divisors (92058033996204).

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

51143352220020 is a wasteful number, since it uses less digits than its factorization.

51143352220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852389203679 (or 852389203677 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 51143352220020 its reverse (2002225334115), we get a palindrome (53145577554135).

The spelling of 51143352220020 in words is "fifty-one trillion, one hundred forty-three billion, three hundred fifty-two million, two hundred twenty thousand, twenty".