51228777 has 8 divisors (see below), whose sum is σ = 68427360. Its totient is φ = 34091360.

The previous prime is 51228773. The next prime is 51228787. The reversal of 51228777 is 77782215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51228777 - 2² = 51228773 is a prime.

It is a super-3 number, since 3×51228777³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51228773) 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, 13299 + ... + 16712.

It is an arithmetic number, because the mean of its divisors is an integer number (8553420).

Almost surely, 2^51228777 is an apocalyptic number.

It is an amenable number.

51228777 is a deficient number, since it is larger than the sum of its proper divisors (17198583).

51228777 is a wasteful number, since it uses less digits than its factorization.

51228777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30583.

The product of its digits is 54880, while the sum is 39.

The square root of 51228777 is about 7157.4280995341. The cubic root of 51228777 is about 371.3966618896.

The spelling of 51228777 in words is "fifty-one million, two hundred twenty-eight thousand, seven hundred seventy-seven".