51075225 has 48 divisors (see below), whose sum is σ = 99368640. Its totient is φ = 25632000.

The previous prime is 51075161. The next prime is 51075257. The reversal of 51075225 is 52257015.

It is a happy number.

It is not a de Polignac number, because 51075225 - 2⁶ = 51075161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9250 + ... + 13700.

It is an arithmetic number, because the mean of its divisors is an integer number (2070180).

Almost surely, 2^51075225 is an apocalyptic number.

It is an amenable number.

51075225 is a deficient number, since it is larger than the sum of its proper divisors (48293415).

51075225 is a wasteful number, since it uses less digits than its factorization.

51075225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487 (or 4476 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 51075225 is about 7146.6932913061. The cubic root of 51075225 is about 371.0252184842.

The spelling of 51075225 in words is "fifty-one million, seventy-five thousand, two hundred twenty-five".