51285159212 has 24 divisors (see below), whose sum is σ = 102815139840. Its totient is φ = 21926892240.

The previous prime is 51285159209. The next prime is 51285159221. The reversal of 51285159212 is 21295158215.

It is a self number, because there is not a number n which added to its sum of digits gives 51285159212.

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, 2173964 + ... + 2197427.

It is an arithmetic number, because the mean of its divisors is an integer number (4283964160).

Almost surely, 2^51285159212 is an apocalyptic number.

It is an amenable number.

51285159212 is an abundant number, since it is smaller than the sum of its proper divisors (51529980628).

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

51285159212 is a wasteful number, since it uses less digits than its factorization.

51285159212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371821 (or 4371819 counting only the distinct ones).

The product of its digits is 72000, while the sum is 41.

The spelling of 51285159212 in words is "fifty-one billion, two hundred eighty-five million, one hundred fifty-nine thousand, two hundred twelve".