55398545 has 4 divisors (see below), whose sum is σ = 66478260. Its totient is φ = 44318832.

The previous prime is 55398533. The next prime is 55398569. The reversal of 55398545 is 54589355.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7054336 + 48344209 = 2656^2 + 6953^2 .

It is a cyclic number.

It is not a de Polignac number, because 55398545 - 2¹⁴ = 55382161 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55398496 and 55398505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5539850 + ... + 5539859.

It is an arithmetic number, because the mean of its divisors is an integer number (16619565).

Almost surely, 2^55398545 is an apocalyptic number.

It is an amenable number.

55398545 is a deficient number, since it is larger than the sum of its proper divisors (11079715).

55398545 is a wasteful number, since it uses less digits than its factorization.

55398545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11079714.

The product of its digits is 540000, while the sum is 44.

The square root of 55398545 is about 7443.0198844286. The cubic root of 55398545 is about 381.2116105751.

The spelling of 55398545 in words is "fifty-five million, three hundred ninety-eight thousand, five hundred forty-five".