55951181 has 16 divisors (see below), whose sum is σ = 69195840. Its totient is φ = 44478720.

The previous prime is 55951153. The next prime is 55951277. The reversal of 55951181 is 18115955.

It is not a de Polignac number, because 55951181 - 2¹⁰ = 55950157 is a prime.

It is a super-3 number, since 3×55951181³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55951381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7580 + ... + 13013.

It is an arithmetic number, because the mean of its divisors is an integer number (4324740).

Almost surely, 2^55951181 is an apocalyptic number.

It is an amenable number.

55951181 is a deficient number, since it is larger than the sum of its proper divisors (13244659).

55951181 is a wasteful number, since it uses less digits than its factorization.

55951181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20636.

The product of its digits is 9000, while the sum is 35.

The square root of 55951181 is about 7480.0522057002. The cubic root of 55951181 is about 382.4750287712.

It can be divided in two parts, 5595 and 1181, that added together give a palindrome (6776).

The spelling of 55951181 in words is "fifty-five million, nine hundred fifty-one thousand, one hundred eighty-one".