51566361 has 64 divisors (see below), whose sum is σ = 93388800. Its totient is φ = 24494400.

The previous prime is 51566341. The next prime is 51566363. The reversal of 51566361 is 16366515.

51566361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51566361 - 2⁵ = 51566329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

Its product of digits (16200) is a multiple of the sum of its prime divisors (450).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51566363) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 135870 + ... + 136248.

It is an arithmetic number, because the mean of its divisors is an integer number (1459200).

Almost surely, 2^51566361 is an apocalyptic number.

It is an amenable number.

51566361 is a deficient number, since it is larger than the sum of its proper divisors (41822439).

51566361 is a wasteful number, since it uses less digits than its factorization.

51566361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450.

The product of its digits is 16200, while the sum is 33.

The square root of 51566361 is about 7180.9721486718. The cubic root of 51566361 is about 372.2106781532.

The spelling of 51566361 in words is "fifty-one million, five hundred sixty-six thousand, three hundred sixty-one".