55890811 has 2 divisors, whose sum is σ = 55890812. Its totient is φ = 55890810.

The previous prime is 55890773. The next prime is 55890827. The reversal of 55890811 is 11809855.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55890811 is a prime.

It is not a weakly prime, because it can be changed into another prime (55890871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27945405 + 27945406.

It is an arithmetic number, because the mean of its divisors is an integer number (27945406).

Almost surely, 2^55890811 is an apocalyptic number.

55890811 is a deficient number, since it is larger than the sum of its proper divisors (1).

55890811 is an equidigital number, since it uses as much as digits as its factorization.

55890811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 55890811 is about 7476.0157169444. The cubic root of 55890811 is about 382.3374187656.

The spelling of 55890811 in words is "fifty-five million, eight hundred ninety thousand, eight hundred eleven".