51865294228 has 24 divisors (see below), whose sum is σ = 99023166144. Its totient is φ = 23573323200.

The previous prime is 51865294199. The next prime is 51865294241. The reversal of 51865294228 is 82249256815.

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, 656368 + ... + 731128.

It is an arithmetic number, because the mean of its divisors is an integer number (4125965256).

Almost surely, 2^51865294228 is an apocalyptic number.

It is an amenable number.

51865294228 is a deficient number, since it is larger than the sum of its proper divisors (47157871916).

51865294228 is a wasteful number, since it uses less digits than its factorization.

51865294228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90543 (or 90541 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 52.

The spelling of 51865294228 in words is "fifty-one billion, eight hundred sixty-five million, two hundred ninety-four thousand, two hundred twenty-eight".