55520545 has 8 divisors (see below), whose sum is σ = 66666600. Its totient is φ = 44388480.

The previous prime is 55520539. The next prime is 55520557. The reversal of 55520545 is 54502555.

55520545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2405601 + 53114944 = 1551^2 + 7288^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55520545 - 2³ = 55520537 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9931 + ... + 14479.

It is an arithmetic number, because the mean of its divisors is an integer number (8333325).

Almost surely, 2^55520545 is an apocalyptic number.

It is an amenable number.

55520545 is a deficient number, since it is larger than the sum of its proper divisors (11146055).

55520545 is a wasteful number, since it uses less digits than its factorization.

55520545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6995.

The product of its (nonzero) digits is 25000, while the sum is 31.

The square root of 55520545 is about 7451.2109754053. The cubic root of 55520545 is about 381.4912431779.

It can be divided in two parts, 55520 and 545, that added together give a palindrome (56065).

The spelling of 55520545 in words is "fifty-five million, five hundred twenty thousand, five hundred forty-five".