51663171 has 8 divisors (see below), whose sum is σ = 78724864. Its totient is φ = 29521800.

The previous prime is 51663149. The next prime is 51663179. The reversal of 51663171 is 17136615.

51663171 is nontrivially palindromic in base 8.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51663171 - 2⁶ = 51663107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51663179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1230055 + ... + 1230096.

It is an arithmetic number, because the mean of its divisors is an integer number (9840608).

Almost surely, 2^51663171 is an apocalyptic number.

51663171 is a deficient number, since it is larger than the sum of its proper divisors (27061693).

51663171 is a wasteful number, since it uses less digits than its factorization.

51663171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460161.

The product of its digits is 3780, while the sum is 30.

The square root of 51663171 is about 7187.7097186795. The cubic root of 51663171 is about 372.4434603314.

Adding to 51663171 its reverse (17136615), we get a palindrome (68799786).

The spelling of 51663171 in words is "fifty-one million, six hundred sixty-three thousand, one hundred seventy-one".