51121828 has 12 divisors (see below), whose sum is σ = 89527900. Its totient is φ = 25542432.

The previous prime is 51121823. The next prime is 51121841. The reversal of 51121828 is 82812115.

It can be written as a sum of positive squares in 2 ways, for example, as 31832164 + 19289664 = 5642^2 + 4392^2 .

It is a super-2 number, since 2×51121828² = 5226882596123168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51121796 and 51121805.

It is not an unprimeable number, because it can be changed into a prime (51121823) 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, 2998 + ... + 10546.

Almost surely, 2^51121828 is an apocalyptic number.

It is an amenable number.

51121828 is a deficient number, since it is larger than the sum of its proper divisors (38406072).

51121828 is a wasteful number, since it uses less digits than its factorization.

51121828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9246 (or 9244 counting only the distinct ones).

The product of its digits is 1280, while the sum is 28.

The square root of 51121828 is about 7149.9530068386. The cubic root of 51121828 is about 371.1380300738.

The spelling of 51121828 in words is "fifty-one million, one hundred twenty-one thousand, eight hundred twenty-eight".