55145933 has 2 divisors, whose sum is σ = 55145934. Its totient is φ = 55145932.

The previous prime is 55145911. The next prime is 55145939. The reversal of 55145933 is 33954155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53260804 + 1885129 = 7298^2 + 1373^2 .

It is a cyclic number.

It is not a de Polignac number, because 55145933 - 2¹⁰ = 55144909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55145893 and 55145902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55145939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27572966 + 27572967.

It is an arithmetic number, because the mean of its divisors is an integer number (27572967).

Almost surely, 2^55145933 is an apocalyptic number.

It is an amenable number.

55145933 is a deficient number, since it is larger than the sum of its proper divisors (1).

55145933 is an equidigital number, since it uses as much as digits as its factorization.

55145933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40500, while the sum is 35.

The square root of 55145933 is about 7426.0307702029. The cubic root of 55145933 is about 380.6312982817.

The spelling of 55145933 in words is "fifty-five million, one hundred forty-five thousand, nine hundred thirty-three".