55780245 has 40 divisors (see below), whose sum is σ = 102348576. Its totient is φ = 29048544.

The previous prime is 55780243. The next prime is 55780261. The reversal of 55780245 is 54208755.

It is a happy number.

55780245 is a `hidden beast` number, since 557 + 80 + 24 + 5 = 666.

55780245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55780245 - 2¹ = 55780243 is a prime.

It is a super-2 number, since 2×55780245² = 6222871464520050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55780243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15814 + ... + 19016.

Almost surely, 2^55780245 is an apocalyptic number.

It is an amenable number.

55780245 is a deficient number, since it is larger than the sum of its proper divisors (46568331).

55780245 is a wasteful number, since it uses less digits than its factorization.

55780245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263 (or 3254 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 55780245 is about 7468.6173419181. The cubic root of 55780245 is about 382.0851326573.

The spelling of 55780245 in words is "fifty-five million, seven hundred eighty thousand, two hundred forty-five".