51204655 has 4 divisors (see below), whose sum is σ = 61445592. Its totient is φ = 40963720.

The previous prime is 51204649. The next prime is 51204721. The reversal of 51204655 is 55640215.

51204655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51204655 - 2⁹ = 51204143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5120461 + ... + 5120470.

It is an arithmetic number, because the mean of its divisors is an integer number (15361398).

Almost surely, 2^51204655 is an apocalyptic number.

51204655 is a deficient number, since it is larger than the sum of its proper divisors (10240937).

51204655 is a wasteful number, since it uses less digits than its factorization.

51204655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10240936.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 51204655 is about 7155.7427986199. The cubic root of 51204655 is about 371.3383597834.

The spelling of 51204655 in words is "fifty-one million, two hundred four thousand, six hundred fifty-five".