55645823 has 2 divisors, whose sum is σ = 55645824. Its totient is φ = 55645822.

The previous prime is 55645801. The next prime is 55645829. The reversal of 55645823 is 32854655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55645823 - 2¹² = 55641727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55645829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27822911 + 27822912.

It is an arithmetic number, because the mean of its divisors is an integer number (27822912).

Almost surely, 2^55645823 is an apocalyptic number.

55645823 is a deficient number, since it is larger than the sum of its proper divisors (1).

55645823 is an equidigital number, since it uses as much as digits as its factorization.

55645823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144000, while the sum is 38.

The square root of 55645823 is about 7459.6127915596. The cubic root of 55645823 is about 381.7779632155. Note that the first 3 decimals are identical.

The spelling of 55645823 in words is "fifty-five million, six hundred forty-five thousand, eight hundred twenty-three".