55771155 has 48 divisors (see below), whose sum is σ = 106089984. Its totient is φ = 26879040.

The previous prime is 55771091. The next prime is 55771171. The reversal of 55771155 is 55117755.

It is not a de Polignac number, because 55771155 - 2⁶ = 55771091 is a prime.

It is a super-2 number, since 2×55771155² = 6220843460068050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151782 + ... + 152148.

It is an arithmetic number, because the mean of its divisors is an integer number (2210208).

Almost surely, 2^55771155 is an apocalyptic number.

55771155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55771155 is a deficient number, since it is larger than the sum of its proper divisors (50318829).

55771155 is a wasteful number, since it uses less digits than its factorization.

55771155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 693 counting only the distinct ones).

The product of its digits is 30625, while the sum is 36.

The square root of 55771155 is about 7468.0087707501. The cubic root of 55771155 is about 382.0643765483.

The spelling of 55771155 in words is "fifty-five million, seven hundred seventy-one thousand, one hundred fifty-five".