51684197 has 8 divisors (see below), whose sum is σ = 54035520. Its totient is φ = 49341600.

The previous prime is 51684187. The next prime is 51684221. The reversal of 51684197 is 79148615.

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

It is a cyclic number.

It is not a de Polignac number, because 51684197 - 2⁴ = 51684181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51684107) 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, 11954 + ... + 15692.

It is an arithmetic number, because the mean of its divisors is an integer number (6754440).

Almost surely, 2^51684197 is an apocalyptic number.

It is an amenable number.

51684197 is a deficient number, since it is larger than the sum of its proper divisors (2351323).

51684197 is a wasteful number, since it uses less digits than its factorization.

51684197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4363.

The product of its digits is 60480, while the sum is 41.

The square root of 51684197 is about 7189.1722054768. The cubic root of 51684197 is about 372.4939794532.

The spelling of 51684197 in words is "fifty-one million, six hundred eighty-four thousand, one hundred ninety-seven".