51366531 has 8 divisors (see below), whose sum is σ = 68531904. Its totient is φ = 34222760.

The previous prime is 51366529. The next prime is 51366559. The reversal of 51366531 is 13566315.

51366531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51366531 - 2¹ = 51366529 is a prime.

It is a super-2 number, since 2×51366531² = 5277041013947922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51376531) 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 7 ways as a sum of consecutive naturals, for example, 1360 + ... + 10226.

It is an arithmetic number, because the mean of its divisors is an integer number (8566488).

Almost surely, 2^51366531 is an apocalyptic number.

51366531 is a deficient number, since it is larger than the sum of its proper divisors (17165373).

51366531 is a wasteful number, since it uses less digits than its factorization.

51366531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10801.

The product of its digits is 8100, while the sum is 30.

The square root of 51366531 is about 7167.0447884745. The cubic root of 51366531 is about 371.7292587200.

The spelling of 51366531 in words is "fifty-one million, three hundred sixty-six thousand, five hundred thirty-one".