51173623 has 2 divisors, whose sum is σ = 51173624. Its totient is φ = 51173622.

The previous prime is 51173609. The next prime is 51173663. The reversal of 51173623 is 32637115.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51173623 is a prime.

It is a super-2 number, since 2×51173623² = 5237479381892258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51173591 and 51173600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51173663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25586811 + 25586812.

It is an arithmetic number, because the mean of its divisors is an integer number (25586812).

Almost surely, 2^51173623 is an apocalyptic number.

51173623 is a deficient number, since it is larger than the sum of its proper divisors (1).

51173623 is an equidigital number, since it uses as much as digits as its factorization.

51173623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 28.

The square root of 51173623 is about 7153.5741416442. The cubic root of 51173623 is about 371.2633294915.

The spelling of 51173623 in words is "fifty-one million, one hundred seventy-three thousand, six hundred twenty-three".