55827945 has 12 divisors (see below), whose sum is σ = 96768516. Its totient is φ = 29774880.

The previous prime is 55827943. The next prime is 55827971. The reversal of 55827945 is 54972855.

55827945 is a `hidden beast` number, since 558 + 2 + 7 + 94 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10830681 + 44997264 = 3291^2 + 6708^2 .

It is not a de Polignac number, because 55827945 - 2¹ = 55827943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1240621 = 55827945 / (5 + 5 + 8 + 2 + 7 + 9 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 55827945.

It is not an unprimeable number, because it can be changed into a prime (55827943) 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 in 11 ways as a sum of consecutive naturals, for example, 620266 + ... + 620355.

It is an arithmetic number, because the mean of its divisors is an integer number (8064043).

Almost surely, 2^55827945 is an apocalyptic number.

It is an amenable number.

55827945 is a deficient number, since it is larger than the sum of its proper divisors (40940571).

55827945 is a wasteful number, since it uses less digits than its factorization.

55827945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240632 (or 1240629 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 55827945 is about 7471.8100216748. The cubic root of 55827945 is about 382.1940139060.

The spelling of 55827945 in words is "fifty-five million, eight hundred twenty-seven thousand, nine hundred forty-five".