55517445 has 12 divisors (see below), whose sum is σ = 96230316. Its totient is φ = 29609280.

The previous prime is 55517443. The next prime is 55517453. The reversal of 55517445 is 54471555.

It can be written as a sum of positive squares in 2 ways, for example, as 21958596 + 33558849 = 4686^2 + 5793^2 .

It is not a de Polignac number, because 55517445 - 2¹ = 55517443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55517443) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 616816 + ... + 616905.

It is an arithmetic number, because the mean of its divisors is an integer number (8019193).

Almost surely, 2^55517445 is an apocalyptic number.

It is an amenable number.

55517445 is a deficient number, since it is larger than the sum of its proper divisors (40712871).

55517445 is a wasteful number, since it uses less digits than its factorization.

55517445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233732 (or 1233729 counting only the distinct ones).

The product of its digits is 70000, while the sum is 36.

The square root of 55517445 is about 7451.0029526232. The cubic root of 55517445 is about 381.4841428342.

It can be divided in two parts, 5551 and 7445, that added together give a square (12996 = 114²).

The spelling of 55517445 in words is "fifty-five million, five hundred seventeen thousand, four hundred forty-five".