51171023 has 4 divisors (see below), whose sum is σ = 52136568. Its totient is φ = 50205480.

The previous prime is 51171019. The next prime is 51171073. The reversal of 51171023 is 32017115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51171023 - 2² = 51171019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51170986 and 51171004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51171073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482693 + ... + 482798.

It is an arithmetic number, because the mean of its divisors is an integer number (13034142).

Almost surely, 2^51171023 is an apocalyptic number.

51171023 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

51171023 is a deficient number, since it is larger than the sum of its proper divisors (965545).

51171023 is an equidigital number, since it uses as much as digits as its factorization.

51171023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965544.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 51171023 is about 7153.3924119959. The cubic root of 51171023 is about 371.2570417405.

Adding to 51171023 its reverse (32017115), we get a palindrome (83188138).

The spelling of 51171023 in words is "fifty-one million, one hundred seventy-one thousand, twenty-three".