55056145 has 16 divisors (see below), whose sum is σ = 67605120. Its totient is φ = 43029504.

The previous prime is 55056143. The next prime is 55056163. The reversal of 55056145 is 54165055.

It is a cyclic number.

It is not a de Polignac number, because 55056145 - 2¹ = 55056143 is a prime.

It is a super-2 number, since 2×55056145² = 6062358204522050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55056143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56452 + ... + 57418.

It is an arithmetic number, because the mean of its divisors is an integer number (4225320).

Almost surely, 2^55056145 is an apocalyptic number.

It is an amenable number.

55056145 is a deficient number, since it is larger than the sum of its proper divisors (12548975).

55056145 is a wasteful number, since it uses less digits than its factorization.

55056145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 55056145 is about 7419.9828166917. The cubic root of 55056145 is about 380.4246061690.

The spelling of 55056145 in words is "fifty-five million, fifty-six thousand, one hundred forty-five".