55717549 has 2 divisors, whose sum is σ = 55717550. Its totient is φ = 55717548.

The previous prime is 55717531. The next prime is 55717577. The reversal of 55717549 is 94571755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41602500 + 14115049 = 6450^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 55717549 - 2¹¹ = 55715501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55717589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27858774 + 27858775.

It is an arithmetic number, because the mean of its divisors is an integer number (27858775).

Almost surely, 2^55717549 is an apocalyptic number.

It is an amenable number.

55717549 is a deficient number, since it is larger than the sum of its proper divisors (1).

55717549 is an equidigital number, since it uses as much as digits as its factorization.

55717549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 220500, while the sum is 43.

The square root of 55717549 is about 7464.4188655246. The cubic root of 55717549 is about 381.9419267000.

The spelling of 55717549 in words is "fifty-five million, seven hundred seventeen thousand, five hundred forty-nine".