51542123 has 2 divisors, whose sum is σ = 51542124. Its totient is φ = 51542122.

The previous prime is 51542053. The next prime is 51542131. The reversal of 51542123 is 32124515.

51542123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51542123 - 2¹⁸ = 51279979 is a prime.

It is not a weakly prime, because it can be changed into another prime (51542143) 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 as a sum of consecutive naturals, namely, 25771061 + 25771062.

It is an arithmetic number, because the mean of its divisors is an integer number (25771062).

Almost surely, 2^51542123 is an apocalyptic number.

51542123 is a deficient number, since it is larger than the sum of its proper divisors (1).

51542123 is an equidigital number, since it uses as much as digits as its factorization.

51542123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 23.

The square root of 51542123 is about 7179.2842958055. The cubic root of 51542123 is about 372.1523516518.

Adding to 51542123 its reverse (32124515), we get a palindrome (83666638).

The spelling of 51542123 in words is "fifty-one million, five hundred forty-two thousand, one hundred twenty-three".