55563511 has 2 divisors, whose sum is σ = 55563512. Its totient is φ = 55563510.

The previous prime is 55563503. The next prime is 55563517. The reversal of 55563511 is 11536555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55563511 - 2³ = 55563503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55563517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27781755 + 27781756.

It is an arithmetic number, because the mean of its divisors is an integer number (27781756).

Almost surely, 2^55563511 is an apocalyptic number.

55563511 is a deficient number, since it is larger than the sum of its proper divisors (1).

55563511 is an equidigital number, since it uses as much as digits as its factorization.

55563511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11250, while the sum is 31.

The square root of 55563511 is about 7454.0935733327. The cubic root of 55563511 is about 381.5896267363.

The spelling of 55563511 in words is "fifty-five million, five hundred sixty-three thousand, five hundred eleven".