55563311 has 2 divisors, whose sum is σ = 55563312. Its totient is φ = 55563310.

The previous prime is 55563289. The next prime is 55563317. The reversal of 55563311 is 11336555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55563311 - 2¹⁸ = 55301167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55563317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27781655 + 27781656.

It is an arithmetic number, because the mean of its divisors is an integer number (27781656).

Almost surely, 2^55563311 is an apocalyptic number.

55563311 is a deficient number, since it is larger than the sum of its proper divisors (1).

55563311 is an equidigital number, since it uses as much as digits as its factorization.

55563311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6750, while the sum is 29.

The square root of 55563311 is about 7454.0801578733. The cubic root of 55563311 is about 381.5891688937.

Adding to 55563311 its reverse (11336555), we get a palindrome (66899866).

The spelling of 55563311 in words is "fifty-five million, five hundred sixty-three thousand, three hundred eleven".