55361819 has 2 divisors, whose sum is σ = 55361820. Its totient is φ = 55361818.

The previous prime is 55361807. The next prime is 55361833. The reversal of 55361819 is 91816355.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55361819 is a prime.

It is a super-2 number, since 2×55361819² = 6129862005977522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55361219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27680909 + 27680910.

It is an arithmetic number, because the mean of its divisors is an integer number (27680910).

Almost surely, 2^55361819 is an apocalyptic number.

55361819 is a deficient number, since it is larger than the sum of its proper divisors (1).

55361819 is an equidigital number, since it uses as much as digits as its factorization.

55361819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 55361819 is about 7440.5523316485. The cubic root of 55361819 is about 381.1273516079.

The spelling of 55361819 in words is "fifty-five million, three hundred sixty-one thousand, eight hundred nineteen".