55571050309 has 2 divisors, whose sum is σ = 55571050310. Its totient is φ = 55571050308.

The previous prime is 55571050267. The next prime is 55571050313. The reversal of 55571050309 is 90305017555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28272741025 + 27298309284 = 168145^2 + 165222^2 .

It is a cyclic number.

It is not a de Polignac number, because 55571050309 - 2²³ = 55562661701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55571050349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27785525154 + 27785525155.

It is an arithmetic number, because the mean of its divisors is an integer number (27785525155).

Almost surely, 2^55571050309 is an apocalyptic number.

It is an amenable number.

55571050309 is a deficient number, since it is larger than the sum of its proper divisors (1).

55571050309 is an equidigital number, since it uses as much as digits as its factorization.

55571050309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118125, while the sum is 40.

The spelling of 55571050309 in words is "fifty-five billion, five hundred seventy-one million, fifty thousand, three hundred nine".