55311623 has 2 divisors, whose sum is σ = 55311624. Its totient is φ = 55311622.

The previous prime is 55311611. The next prime is 55311629. The reversal of 55311623 is 32611355.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55311623 - 2⁸ = 55311367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55311592 and 55311601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55311629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27655811 + 27655812.

It is an arithmetic number, because the mean of its divisors is an integer number (27655812).

Almost surely, 2^55311623 is an apocalyptic number.

55311623 is a deficient number, since it is larger than the sum of its proper divisors (1).

55311623 is an equidigital number, since it uses as much as digits as its factorization.

55311623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 26.

The square root of 55311623 is about 7437.1784300230. The cubic root of 55311623 is about 381.0121286752.

Adding to 55311623 its reverse (32611355), we get a palindrome (87922978).

The spelling of 55311623 in words is "fifty-five million, three hundred eleven thousand, six hundred twenty-three".