55261143 has 32 divisors (see below), whose sum is σ = 95569920. Its totient is φ = 30900960.

The previous prime is 55261123. The next prime is 55261159. The reversal of 55261143 is 34116255.

55261143 is a `hidden beast` number, since 5 + 5 + 2 + 611 + 43 = 666.

It is not a de Polignac number, because 55261143 - 2²¹ = 53163991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55261103) 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 31 ways as a sum of consecutive naturals, for example, 5773 + ... + 11993.

It is an arithmetic number, because the mean of its divisors is an integer number (2986560).

Almost surely, 2^55261143 is an apocalyptic number.

55261143 is a deficient number, since it is larger than the sum of its proper divisors (40308777).

55261143 is a wasteful number, since it uses less digits than its factorization.

55261143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6284 (or 6278 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 55261143 is about 7433.7838951640. The cubic root of 55261143 is about 380.8961835066.

Adding to 55261143 its reverse (34116255), we get a palindrome (89377398).

The spelling of 55261143 in words is "fifty-five million, two hundred sixty-one thousand, one hundred forty-three".