55123553 has 2 divisors, whose sum is σ = 55123554. Its totient is φ = 55123552.

The previous prime is 55123543. The next prime is 55123559. The reversal of 55123553 is 35532155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46403344 + 8720209 = 6812^2 + 2953^2 .

It is a cyclic number.

It is not a de Polignac number, because 55123553 - 2²⁴ = 38346337 is a prime.

It is not a weakly prime, because it can be changed into another prime (55123559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27561776 + 27561777.

It is an arithmetic number, because the mean of its divisors is an integer number (27561777).

Almost surely, 2^55123553 is an apocalyptic number.

It is an amenable number.

55123553 is a deficient number, since it is larger than the sum of its proper divisors (1).

55123553 is an equidigital number, since it uses as much as digits as its factorization.

55123553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11250, while the sum is 29.

The square root of 55123553 is about 7424.5237557705. The cubic root of 55123553 is about 380.5798004914.

The spelling of 55123553 in words is "fifty-five million, one hundred twenty-three thousand, five hundred fifty-three".