51366523 has 16 divisors (see below), whose sum is σ = 56689920. Its totient is φ = 46255104.

The previous prime is 51366517. The next prime is 51366529. The reversal of 51366523 is 32566315.

It is an interprime number because it is at equal distance from previous prime (51366517) and next prime (51366529).

It is a cyclic number.

It is not a de Polignac number, because 51366523 - 2⁹ = 51366011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51366529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106998 + ... + 107476.

It is an arithmetic number, because the mean of its divisors is an integer number (3543120).

Almost surely, 2^51366523 is an apocalyptic number.

51366523 is a deficient number, since it is larger than the sum of its proper divisors (5323397).

51366523 is a wasteful number, since it uses less digits than its factorization.

51366523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678.

The product of its digits is 16200, while the sum is 31.

The square root of 51366523 is about 7167.0442303644. The cubic root of 51366523 is about 371.7292394218.

The spelling of 51366523 in words is "fifty-one million, three hundred sixty-six thousand, five hundred twenty-three".