52781819 has 2 divisors, whose sum is σ = 52781820. Its totient is φ = 52781818.

The previous prime is 52781797. The next prime is 52781831. The reversal of 52781819 is 91818725.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52781819 - 2¹² = 52777723 is a prime.

It is a super-2 number, since 2×52781819² = 5571840833897522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52781119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26390909 + 26390910.

It is an arithmetic number, because the mean of its divisors is an integer number (26390910).

Almost surely, 2^52781819 is an apocalyptic number.

52781819 is a deficient number, since it is larger than the sum of its proper divisors (1).

52781819 is an equidigital number, since it uses as much as digits as its factorization.

52781819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 41.

The square root of 52781819 is about 7265.1097032323. The cubic root of 52781819 is about 375.1124261428.

The spelling of 52781819 in words is "fifty-two million, seven hundred eighty-one thousand, eight hundred nineteen".