51012225 has 36 divisors (see below), whose sum is σ = 99679632. Its totient is φ = 24732000.

The previous prime is 51012211. The next prime is 51012253. The reversal of 51012225 is 52221015.

It is not a de Polignac number, because 51012225 - 2⁴ = 51012209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51012198 and 51012207.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7831 + ... + 12780.

Almost surely, 2^51012225 is an apocalyptic number.

51012225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51012225 is a deficient number, since it is larger than the sum of its proper divisors (48667407).

51012225 is a wasteful number, since it uses less digits than its factorization.

51012225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20638 (or 20630 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51012225 is about 7142.2842984580. The cubic root of 51012225 is about 370.8726056404.

The spelling of 51012225 in words is "fifty-one million, twelve thousand, two hundred twenty-five".