51697801 has 8 divisors (see below), whose sum is σ = 53460224. Its totient is φ = 49941360.

The previous prime is 51697787. The next prime is 51697823. The reversal of 51697801 is 10879615.

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 51697801 - 2⁷ = 51697673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51697831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22366 + ... + 24568.

It is an arithmetic number, because the mean of its divisors is an integer number (6682528).

Almost surely, 2^51697801 is an apocalyptic number.

It is an amenable number.

51697801 is a deficient number, since it is larger than the sum of its proper divisors (1762423).

51697801 is a wasteful number, since it uses less digits than its factorization.

51697801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 51697801 is about 7190.1182883177. The cubic root of 51697801 is about 372.5266584528.

The spelling of 51697801 in words is "fifty-one million, six hundred ninety-seven thousand, eight hundred one".