51798145 has 16 divisors (see below), whose sum is σ = 72489600. Its totient is φ = 35517552.

The previous prime is 51798143. The next prime is 51798157. The reversal of 51798145 is 54189715.

It is a happy number.

It is not a de Polignac number, because 51798145 - 2¹ = 51798143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51798098 and 51798107.

It is not an unprimeable number, because it can be changed into a prime (51798143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13387 + ... + 16816.

It is an arithmetic number, because the mean of its divisors is an integer number (4530600).

Almost surely, 2^51798145 is an apocalyptic number.

It is an amenable number.

51798145 is a deficient number, since it is larger than the sum of its proper divisors (20691455).

51798145 is an equidigital number, since it uses as much as digits as its factorization.

51798145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30229 (or 30215 counting only the distinct ones).

The product of its digits is 50400, while the sum is 40.

The square root of 51798145 is about 7197.0928158528. The cubic root of 51798145 is about 372.7675239912.

The spelling of 51798145 in words is "fifty-one million, seven hundred ninety-eight thousand, one hundred forty-five".