55553203 has 2 divisors, whose sum is σ = 55553204. Its totient is φ = 55553202.

The previous prime is 55553189. The next prime is 55553231. The reversal of 55553203 is 30235555.

It is an a-pointer prime, because the next prime (55553231) can be obtained adding 55553203 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55553203 - 2⁹ = 55552691 is a prime.

It is not a weakly prime, because it can be changed into another prime (55553233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27776601 + 27776602.

It is an arithmetic number, because the mean of its divisors is an integer number (27776602).

Almost surely, 2^55553203 is an apocalyptic number.

55553203 is a deficient number, since it is larger than the sum of its proper divisors (1).

55553203 is an equidigital number, since it uses as much as digits as its factorization.

55553203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11250, while the sum is 28.

The square root of 55553203 is about 7453.4021091043. The cubic root of 55553203 is about 381.5660281007.

Adding to 55553203 its reverse (30235555), we get a palindrome (85788758).

The spelling of 55553203 in words is "fifty-five million, five hundred fifty-three thousand, two hundred three".