51065567 has 4 divisors (see below), whose sum is σ = 58360656. Its totient is φ = 43770480.

The previous prime is 51065533. The next prime is 51065579. The reversal of 51065567 is 76556015.

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

It is a cyclic number.

It is not a de Polignac number, because 51065567 - 2¹⁴ = 51049183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51065527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3647534 + ... + 3647547.

It is an arithmetic number, because the mean of its divisors is an integer number (14590164).

Almost surely, 2^51065567 is an apocalyptic number.

51065567 is a deficient number, since it is larger than the sum of its proper divisors (7295089).

51065567 is an equidigital number, since it uses as much as digits as its factorization.

51065567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7295088.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 51065567 is about 7146.0175622510. The cubic root of 51065567 is about 371.0018308408.

The spelling of 51065567 in words is "fifty-one million, sixty-five thousand, five hundred sixty-seven".