51199225 has 24 divisors (see below), whose sum is σ = 79155648. Its totient is φ = 31915200.

The previous prime is 51199193. The next prime is 51199237. The reversal of 51199225 is 52299115.

It is not a de Polignac number, because 51199225 - 2⁵ = 51199193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11374 + ... + 15223.

It is an arithmetic number, because the mean of its divisors is an integer number (3298152).

Almost surely, 2^51199225 is an apocalyptic number.

51199225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51199225 is a deficient number, since it is larger than the sum of its proper divisors (27956423).

51199225 is a wasteful number, since it uses less digits than its factorization.

51199225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26625 (or 26620 counting only the distinct ones).

The product of its digits is 8100, while the sum is 34.

The square root of 51199225 is about 7155.3633730231. The cubic root of 51199225 is about 371.3252331216.

The spelling of 51199225 in words is "fifty-one million, one hundred ninety-nine thousand, two hundred twenty-five".