55028791 has 2 divisors, whose sum is σ = 55028792. Its totient is φ = 55028790.

The previous prime is 55028767. The next prime is 55028797. The reversal of 55028791 is 19782055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55028791 - 2⁷ = 55028663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55028791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55028797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27514395 + 27514396.

It is an arithmetic number, because the mean of its divisors is an integer number (27514396).

Almost surely, 2^55028791 is an apocalyptic number.

55028791 is a deficient number, since it is larger than the sum of its proper divisors (1).

55028791 is an equidigital number, since it uses as much as digits as its factorization.

55028791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 55028791 is about 7418.1393219594. The cubic root of 55028791 is about 380.3615925638.

The spelling of 55028791 in words is "fifty-five million, twenty-eight thousand, seven hundred ninety-one".