55555553 has 2 divisors, whose sum is σ = 55555554. Its totient is φ = 55555552.

The previous prime is 55555547. The next prime is 55555559. The reversal of 55555553 is 35555555.

It is a balanced prime because it is at equal distance from previous prime (55555547) and next prime (55555559).

It can be written as a sum of positive squares in only one way, i.e., 35904064 + 19651489 = 5992^2 + 4433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55555553 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (55555559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777776 + 27777777.

It is an arithmetic number, because the mean of its divisors is an integer number (27777777).

Almost surely, 2^55555553 is an apocalyptic number.

It is an amenable number.

55555553 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555553 is an equidigital number, since it uses as much as digits as its factorization.

55555553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 234375, while the sum is 38.

The square root of 55555553 is about 7453.5597535674. The cubic root of 55555553 is about 381.5714083337.

The spelling of 55555553 in words is "fifty-five million, five hundred fifty-five thousand, five hundred fifty-three".