51173663 has 2 divisors, whose sum is σ = 51173664. Its totient is φ = 51173662.

The previous prime is 51173623. The next prime is 51173677. The reversal of 51173663 is 36637115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51173663 - 2⁸ = 51173407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51173623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25586831 + 25586832.

It is an arithmetic number, because the mean of its divisors is an integer number (25586832).

Almost surely, 2^51173663 is an apocalyptic number.

51173663 is a deficient number, since it is larger than the sum of its proper divisors (1).

51173663 is an equidigital number, since it uses as much as digits as its factorization.

51173663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 32.

The square root of 51173663 is about 7153.5769374488. The cubic root of 51173663 is about 371.2634262245.

The spelling of 51173663 in words is "fifty-one million, one hundred seventy-three thousand, six hundred sixty-three".