51097 has 4 divisors (see below), whose sum is σ = 52516. Its totient is φ = 49680.

The previous prime is 51071. The next prime is 51109. The reversal of 51097 is 79015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79015 = 5 ⋅15803.

It can be written as a sum of positive squares in 2 ways, for example, as 35721 + 15376 = 189^2 + 124^2 .

It is a cyclic number.

It is not a de Polignac number, because 51097 - 2⁷ = 50969 is a prime.

It is a super-2 number, since 2×51097² = 5221806818, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (51047) 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, 654 + ... + 727.

It is an arithmetic number, because the mean of its divisors is an integer number (13129).

2⁵¹⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

51097 is a deficient number, since it is larger than the sum of its proper divisors (1419).

51097 is a wasteful number, since it uses less digits than its factorization.

51097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418.

The product of its (nonzero) digits is 315, while the sum is 22.

The square root of 51097 is about 226.0464554024. The cubic root of 51097 is about 37.1077937627.

The spelling of 51097 in words is "fifty-one thousand, ninety-seven".