55122545 has 4 divisors (see below), whose sum is σ = 66147060. Its totient is φ = 44098032.

The previous prime is 55122527. The next prime is 55122581. The reversal of 55122545 is 54522155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54522155 = 5 ⋅10904431.

It can be written as a sum of positive squares in 2 ways, for example, as 26296384 + 28826161 = 5128^2 + 5369^2 .

It is a cyclic number.

It is not a de Polignac number, because 55122545 - 2⁸ = 55122289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5512250 + ... + 5512259.

It is an arithmetic number, because the mean of its divisors is an integer number (16536765).

Almost surely, 2^55122545 is an apocalyptic number.

It is an amenable number.

55122545 is a deficient number, since it is larger than the sum of its proper divisors (11024515).

55122545 is a wasteful number, since it uses less digits than its factorization.

55122545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11024514.

The product of its digits is 10000, while the sum is 29.

The square root of 55122545 is about 7424.4558723182. The cubic root of 55122545 is about 380.5774806919.

The spelling of 55122545 in words is "fifty-five million, one hundred twenty-two thousand, five hundred forty-five".