55009553 has 2 divisors, whose sum is σ = 55009554. Its totient is φ = 55009552.

The previous prime is 55009543. The next prime is 55009561. The reversal of 55009553 is 35590055.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52243984 + 2765569 = 7228^2 + 1663^2 .

It is a cyclic number.

It is not a de Polignac number, because 55009553 - 2¹⁸ = 54747409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55009523) 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, 27504776 + 27504777.

It is an arithmetic number, because the mean of its divisors is an integer number (27504777).

Almost surely, 2^55009553 is an apocalyptic number.

It is an amenable number.

55009553 is a deficient number, since it is larger than the sum of its proper divisors (1).

55009553 is an equidigital number, since it uses as much as digits as its factorization.

55009553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16875, while the sum is 32.

The square root of 55009553 is about 7416.8425222597. The cubic root of 55009553 is about 380.3172627438.

The spelling of 55009553 in words is "fifty-five million, nine thousand, five hundred fifty-three".