51818443 has 2 divisors, whose sum is σ = 51818444. Its totient is φ = 51818442.

The previous prime is 51818411. The next prime is 51818449. The reversal of 51818443 is 34481815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51818443 - 2⁵ = 51818411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51818399 and 51818408.

It is not a weakly prime, because it can be changed into another prime (51818449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25909221 + 25909222.

It is an arithmetic number, because the mean of its divisors is an integer number (25909222).

Almost surely, 2^51818443 is an apocalyptic number.

51818443 is a deficient number, since it is larger than the sum of its proper divisors (1).

51818443 is an equidigital number, since it uses as much as digits as its factorization.

51818443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 34.

The square root of 51818443 is about 7198.5028304502. The cubic root of 51818443 is about 372.8162094352.

The spelling of 51818443 in words is "fifty-one million, eight hundred eighteen thousand, four hundred forty-three".