51573186220 has 12 divisors (see below), whose sum is σ = 108303691104. Its totient is φ = 20629274480.

The previous prime is 51573186193. The next prime is 51573186221. The reversal of 51573186220 is 2268137515.

It is not an unprimeable number, because it can be changed into a prime (51573186221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289329636 + ... + 1289329675.

It is an arithmetic number, because the mean of its divisors is an integer number (9025307592).

Almost surely, 2^51573186220 is an apocalyptic number.

It is an amenable number.

51573186220 is an abundant number, since it is smaller than the sum of its proper divisors (56730504884).

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

51573186220 is a wasteful number, since it uses less digits than its factorization.

51573186220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578659320 (or 2578659318 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 51573186220 in words is "fifty-one billion, five hundred seventy-three million, one hundred eighty-six thousand, two hundred twenty".