55040501 has 2 divisors, whose sum is σ = 55040502. Its totient is φ = 55040500.

The previous prime is 55040459. The next prime is 55040507. The reversal of 55040501 is 10504055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39627025 + 15413476 = 6295^2 + 3926^2 .

It is a cyclic number.

It is not a de Polignac number, because 55040501 - 2¹⁴ = 55024117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55040507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27520250 + 27520251.

It is an arithmetic number, because the mean of its divisors is an integer number (27520251).

Almost surely, 2^55040501 is an apocalyptic number.

It is an amenable number.

55040501 is a deficient number, since it is larger than the sum of its proper divisors (1).

55040501 is an equidigital number, since it uses as much as digits as its factorization.

55040501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 55040501 is about 7418.9285614568. The cubic root of 55040501 is about 380.3885706740.

Adding to 55040501 its reverse (10504055), we get a palindrome (65544556).

The spelling of 55040501 in words is "fifty-five million, forty thousand, five hundred one".