55426213 has 2 divisors, whose sum is σ = 55426214. Its totient is φ = 55426212.

The previous prime is 55426177. The next prime is 55426223. The reversal of 55426213 is 31262455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55383364 + 42849 = 7442^2 + 207^2 .

It is a cyclic number.

It is not a de Polignac number, because 55426213 - 2⁹ = 55425701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55426223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27713106 + 27713107.

It is an arithmetic number, because the mean of its divisors is an integer number (27713107).

Almost surely, 2^55426213 is an apocalyptic number.

It is an amenable number.

55426213 is a deficient number, since it is larger than the sum of its proper divisors (1).

55426213 is an equidigital number, since it uses as much as digits as its factorization.

55426213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The square root of 55426213 is about 7444.8783065944. The cubic root of 55426213 is about 381.2750635498.

Adding to 55426213 its reverse (31262455), we get a palindrome (86688668).

The spelling of 55426213 in words is "fifty-five million, four hundred twenty-six thousand, two hundred thirteen".