51555265 has 8 divisors (see below), whose sum is σ = 65122560. Its totient is φ = 39073392.

The previous prime is 51555253. The next prime is 51555289. The reversal of 51555265 is 56255515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51555265 - 2⁷ = 51555137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51555265.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271249 + ... + 271438.

It is an arithmetic number, because the mean of its divisors is an integer number (8140320).

Almost surely, 2^51555265 is an apocalyptic number.

It is an amenable number.

51555265 is a deficient number, since it is larger than the sum of its proper divisors (13567295).

51555265 is a wasteful number, since it uses less digits than its factorization.

51555265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542711.

The product of its digits is 37500, while the sum is 34.

The square root of 51555265 is about 7180.1995097629. The cubic root of 51555265 is about 372.1839789261.

The spelling of 51555265 in words is "fifty-one million, five hundred fifty-five thousand, two hundred sixty-five".