51617123 has 2 divisors, whose sum is σ = 51617124. Its totient is φ = 51617122.

The previous prime is 51617113. The next prime is 51617173. The reversal of 51617123 is 32171615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51617123 - 2⁴ = 51617107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51617092 and 51617101.

It is not a weakly prime, because it can be changed into another prime (51617113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25808561 + 25808562.

It is an arithmetic number, because the mean of its divisors is an integer number (25808562).

Almost surely, 2^51617123 is an apocalyptic number.

51617123 is a deficient number, since it is larger than the sum of its proper divisors (1).

51617123 is an equidigital number, since it uses as much as digits as its factorization.

51617123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 51617123 is about 7184.5057589232. The cubic root of 51617123 is about 372.3327730077.

Adding to 51617123 its reverse (32171615), we get a palindrome (83788738).

The spelling of 51617123 in words is "fifty-one million, six hundred seventeen thousand, one hundred twenty-three".