55971155 has 8 divisors (see below), whose sum is σ = 67277952. Its totient is φ = 44701888.

The previous prime is 55971137. The next prime is 55971187. The reversal of 55971155 is 55117955.

55971155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55971155 - 2¹⁴ = 55954771 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5987 + ... + 12156.

It is an arithmetic number, because the mean of its divisors is an integer number (8409744).

Almost surely, 2^55971155 is an apocalyptic number.

55971155 is a deficient number, since it is larger than the sum of its proper divisors (11306797).

55971155 is a wasteful number, since it uses less digits than its factorization.

55971155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18765.

The product of its digits is 39375, while the sum is 38.

The square root of 55971155 is about 7481.3872376719. The cubic root of 55971155 is about 382.5205365823.

The spelling of 55971155 in words is "fifty-five million, nine hundred seventy-one thousand, one hundred fifty-five".