55143549 has 12 divisors (see below), whose sum is σ = 81347136. Its totient is φ = 35979912.

The previous prime is 55143547. The next prime is 55143619. The reversal of 55143549 is 94534155.

It is not a de Polignac number, because 55143549 - 2¹ = 55143547 is a prime.

It is a super-3 number, since 3×55143549³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55143547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64759 + ... + 65604.

It is an arithmetic number, because the mean of its divisors is an integer number (6778928).

Almost surely, 2^55143549 is an apocalyptic number.

It is an amenable number.

55143549 is a deficient number, since it is larger than the sum of its proper divisors (26203587).

55143549 is a wasteful number, since it uses less digits than its factorization.

55143549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130416 (or 130413 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 55143549 is about 7425.8702520311. The cubic root of 55143549 is about 380.6258132106.

It can be divided in two parts, 551 and 43549, that added together give a square (44100 = 210²).

The spelling of 55143549 in words is "fifty-five million, one hundred forty-three thousand, five hundred forty-nine".