13550445 has 24 divisors (see below), whose sum is σ = 24870456. Its totient is φ = 6801408.

The previous prime is 13550443. The next prime is 13550447. The reversal of 13550445 is 54405531.

It is an interprime number because it is at equal distance from previous prime (13550443) and next prime (13550447).

It can be written as a sum of positive squares in 4 ways, for example, as 6081156 + 7469289 = 2466^2 + 2733^2 .

It is not a de Polignac number, because 13550445 - 2¹ = 13550443 is a prime.

It is a super-2 number, since 2×13550445² = 367229119396050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13550443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8092 + ... + 9621.

It is an arithmetic number, because the mean of its divisors is an integer number (1036269).

Almost surely, 2^13550445 is an apocalyptic number.

13550445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13550445 is a deficient number, since it is larger than the sum of its proper divisors (11320011).

13550445 is a wasteful number, since it uses less digits than its factorization.

13550445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17741 (or 17738 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 13550445 is about 3681.0929083629. The cubic root of 13550445 is about 238.4063685839.

Adding to 13550445 its reverse (54405531), we get a palindrome (67955976).

The spelling of 13550445 in words is "thirteen million, five hundred fifty thousand, four hundred forty-five".