51435000220 has 24 divisors (see below), whose sum is σ = 108637863264. Its totient is φ = 20455073856.

The previous prime is 51435000193. The next prime is 51435000223. The reversal of 51435000220 is 2200053415.

It is a junction number, because it is equal to n+sod(n) for n = 51435000191 and 51435000200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51435000223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7429344 + ... + 7436263.

It is an arithmetic number, because the mean of its divisors is an integer number (4526577636).

Almost surely, 2^51435000220 is an apocalyptic number.

It is an amenable number.

51435000220 is an abundant number, since it is smaller than the sum of its proper divisors (57202863044).

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

51435000220 is a wasteful number, since it uses less digits than its factorization.

51435000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14865789 (or 14865787 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 51435000220 its reverse (2200053415), we get a palindrome (53635053635).

The spelling of 51435000220 in words is "fifty-one billion, four hundred thirty-five million, two hundred twenty", and thus it is an aban number.