55383817 has 2 divisors, whose sum is σ = 55383818. Its totient is φ = 55383816.

The previous prime is 55383767. The next prime is 55383827. The reversal of 55383817 is 71838355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52359696 + 3024121 = 7236^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 55383817 - 2²³ = 46995209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55383817.

It is not a weakly prime, because it can be changed into another prime (55383827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27691908 + 27691909.

It is an arithmetic number, because the mean of its divisors is an integer number (27691909).

Almost surely, 2^55383817 is an apocalyptic number.

It is an amenable number.

55383817 is a deficient number, since it is larger than the sum of its proper divisors (1).

55383817 is an equidigital number, since it uses as much as digits as its factorization.

55383817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The square root of 55383817 is about 7442.0304353046. The cubic root of 55383817 is about 381.1778251979.

The spelling of 55383817 in words is "fifty-five million, three hundred eighty-three thousand, eight hundred seventeen".