51617873 has 2 divisors, whose sum is σ = 51617874. Its totient is φ = 51617872.

The previous prime is 51617833. The next prime is 51617887. The reversal of 51617873 is 37871615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28654609 + 22963264 = 5353^2 + 4792^2 .

It is a cyclic number.

It is not a de Polignac number, because 51617873 - 2⁶ = 51617809 is a prime.

It is not a weakly prime, because it can be changed into another prime (51617833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25808936 + 25808937.

It is an arithmetic number, because the mean of its divisors is an integer number (25808937).

Almost surely, 2^51617873 is an apocalyptic number.

It is an amenable number.

51617873 is a deficient number, since it is larger than the sum of its proper divisors (1).

51617873 is an equidigital number, since it uses as much as digits as its factorization.

51617873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 51617873 is about 7184.5579543908. The cubic root of 51617873 is about 372.3345763384.

The spelling of 51617873 in words is "fifty-one million, six hundred seventeen thousand, eight hundred seventy-three".