55072903 has 2 divisors, whose sum is σ = 55072904. Its totient is φ = 55072902.

The previous prime is 55072889. The next prime is 55072921. The reversal of 55072903 is 30927055.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55072903 - 2²¹ = 52975751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55070903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27536451 + 27536452.

It is an arithmetic number, because the mean of its divisors is an integer number (27536452).

Almost surely, 2^55072903 is an apocalyptic number.

55072903 is a deficient number, since it is larger than the sum of its proper divisors (1).

55072903 is an equidigital number, since it uses as much as digits as its factorization.

55072903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 55072903 is about 7421.1119786727. Note that the first 3 decimals coincide. The cubic root of 55072903 is about 380.4632001584.

Adding to 55072903 its reverse (30927055), we get a palindrome (85999958).

The spelling of 55072903 in words is "fifty-five million, seventy-two thousand, nine hundred three".