51151225 has 6 divisors (see below), whose sum is σ = 63427550. Its totient is φ = 40920960.

The previous prime is 51151223. The next prime is 51151229. The reversal of 51151225 is 52215115.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 121 + 51151104 = 11^2 + 7152^2 .

It is not a de Polignac number, because 51151225 - 2¹ = 51151223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51151196 and 51151205.

It is not an unprimeable number, because it can be changed into a prime (51151223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1023000 + ... + 1023049.

Almost surely, 2^51151225 is an apocalyptic number.

It is an amenable number.

51151225 is a deficient number, since it is larger than the sum of its proper divisors (12276325).

51151225 is a wasteful number, since it uses less digits than its factorization.

51151225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046059 (or 2046054 counting only the distinct ones).

The product of its digits is 500, while the sum is 22.

The square root of 51151225 is about 7152.0084591673. The cubic root of 51151225 is about 371.2091559475.

The spelling of 51151225 in words is "fifty-one million, one hundred fifty-one thousand, two hundred twenty-five".