55975181 has 4 divisors (see below), whose sum is σ = 57780864. Its totient is φ = 54169500.

The previous prime is 55975163. The next prime is 55975187. The reversal of 55975181 is 18157955.

55975181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55975181 is a prime.

It is a super-2 number, since 2×55975181² = 6266441775965522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55975187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902795 + ... + 902856.

It is an arithmetic number, because the mean of its divisors is an integer number (14445216).

Almost surely, 2^55975181 is an apocalyptic number.

It is an amenable number.

55975181 is a deficient number, since it is larger than the sum of its proper divisors (1805683).

55975181 is a wasteful number, since it uses less digits than its factorization.

55975181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805682.

The product of its digits is 63000, while the sum is 41.

The square root of 55975181 is about 7481.6563005794. The cubic root of 55975181 is about 382.5297079180.

The spelling of 55975181 in words is "fifty-five million, nine hundred seventy-five thousand, one hundred eighty-one".