51818119 has 4 divisors (see below), whose sum is σ = 51906096. Its totient is φ = 51730144.

The previous prime is 51818087. The next prime is 51818141. The reversal of 51818119 is 91181815.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91181815 = 5 ⋅18236363.

It is a cyclic number.

It is not a de Polignac number, because 51818119 - 2⁵ = 51818087 is a prime.

It is a super-2 number, since 2×51818119² = 5370234913396322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51810119) 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, 43099 + ... + 44284.

It is an arithmetic number, because the mean of its divisors is an integer number (12976524).

Almost surely, 2^51818119 is an apocalyptic number.

51818119 is a deficient number, since it is larger than the sum of its proper divisors (87977).

51818119 is an equidigital number, since it uses as much as digits as its factorization.

51818119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87976.

The product of its digits is 2880, while the sum is 34.

The square root of 51818119 is about 7198.4803257354. The cubic root of 51818119 is about 372.8154324101.

The spelling of 51818119 in words is "fifty-one million, eight hundred eighteen thousand, one hundred nineteen".