55340213 has 2 divisors, whose sum is σ = 55340214. Its totient is φ = 55340212.

The previous prime is 55340147. The next prime is 55340249. The reversal of 55340213 is 31204355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45468049 + 9872164 = 6743^2 + 3142^2 .

It is a cyclic number.

It is not a de Polignac number, because 55340213 - 2⁸ = 55339957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55340113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27670106 + 27670107.

It is an arithmetic number, because the mean of its divisors is an integer number (27670107).

Almost surely, 2^55340213 is an apocalyptic number.

It is an amenable number.

55340213 is a deficient number, since it is larger than the sum of its proper divisors (1).

55340213 is an equidigital number, since it uses as much as digits as its factorization.

55340213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 55340213 is about 7439.1002816201. The cubic root of 55340213 is about 381.0777644304.

Adding to 55340213 its reverse (31204355), we get a palindrome (86544568).

The spelling of 55340213 in words is "fifty-five million, three hundred forty thousand, two hundred thirteen".