51565153 has 4 divisors (see below), whose sum is σ = 51608340. Its totient is φ = 51521968.

The previous prime is 51565133. The next prime is 51565169. The reversal of 51565153 is 35156515.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42732369 + 8832784 = 6537^2 + 2972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51565153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51565123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19750 + ... + 22207.

It is an arithmetic number, because the mean of its divisors is an integer number (12902085).

Almost surely, 2^51565153 is an apocalyptic number.

It is an amenable number.

51565153 is a deficient number, since it is larger than the sum of its proper divisors (43187).

51565153 is a wasteful number, since it uses less digits than its factorization.

51565153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43186.

The product of its digits is 11250, while the sum is 31.

The square root of 51565153 is about 7180.8880370049. Note that the first 3 decimals coincide. The cubic root of 51565153 is about 372.2077716460.

The spelling of 51565153 in words is "fifty-one million, five hundred sixty-five thousand, one hundred fifty-three".