55220293 has 2 divisors, whose sum is σ = 55220294. Its totient is φ = 55220292.

The previous prime is 55220281. The next prime is 55220353. The reversal of 55220293 is 39202255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47914084 + 7306209 = 6922^2 + 2703^2 .

It is a cyclic number.

It is not a de Polignac number, because 55220293 - 2⁹ = 55219781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55220203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27610146 + 27610147.

It is an arithmetic number, because the mean of its divisors is an integer number (27610147).

Almost surely, 2^55220293 is an apocalyptic number.

It is an amenable number.

55220293 is a deficient number, since it is larger than the sum of its proper divisors (1).

55220293 is an equidigital number, since it uses as much as digits as its factorization.

55220293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 55220293 is about 7431.0357959036. The cubic root of 55220293 is about 380.8023053383.

The spelling of 55220293 in words is "fifty-five million, two hundred twenty thousand, two hundred ninety-three".