55811711 has 2 divisors, whose sum is σ = 55811712. Its totient is φ = 55811710.

The previous prime is 55811669. The next prime is 55811719. The reversal of 55811711 is 11711855.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55811711 - 2⁶ = 55811647 is a prime.

It is a super-2 number, since 2×55811711² = 6229894169495042, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55811719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27905855 + 27905856.

It is an arithmetic number, because the mean of its divisors is an integer number (27905856).

Almost surely, 2^55811711 is an apocalyptic number.

55811711 is a deficient number, since it is larger than the sum of its proper divisors (1).

55811711 is an equidigital number, since it uses as much as digits as its factorization.

55811711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 29.

The square root of 55811711 is about 7470.7235927988. The cubic root of 55811711 is about 382.1569647238.

The spelling of 55811711 in words is "fifty-five million, eight hundred eleven thousand, seven hundred eleven".