51818293 has 2 divisors, whose sum is σ = 51818294. Its totient is φ = 51818292.

The previous prime is 51818251. The next prime is 51818357. The reversal of 51818293 is 39281815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51581124 + 237169 = 7182^2 + 487^2 .

It is a cyclic number.

It is not a de Polignac number, because 51818293 - 2¹⁷ = 51687221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51818213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25909146 + 25909147.

It is an arithmetic number, because the mean of its divisors is an integer number (25909147).

Almost surely, 2^51818293 is an apocalyptic number.

It is an amenable number.

51818293 is a deficient number, since it is larger than the sum of its proper divisors (1).

51818293 is an equidigital number, since it uses as much as digits as its factorization.

51818293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 37.

The square root of 51818293 is about 7198.4924116095. The cubic root of 51818293 is about 372.8158497017.

The spelling of 51818293 in words is "fifty-one million, eight hundred eighteen thousand, two hundred ninety-three".