55155155 has 8 divisors (see below), whose sum is σ = 72203184. Its totient is φ = 40112800.

The previous prime is 55155151. The next prime is 55155167.

55155155 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 55155155 - 2² = 55155151 is a prime.

It is a super-2 number, since 2×55155155² = 6084182246148050, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55155151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501356 + ... + 501465.

It is an arithmetic number, because the mean of its divisors is an integer number (9025398).

Almost surely, 2^55155155 is an apocalyptic number.

55155155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55155155 is a deficient number, since it is larger than the sum of its proper divisors (17048029).

55155155 is a wasteful number, since it uses less digits than its factorization.

55155155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002837.

The product of its digits is 15625, while the sum is 32.

The square root of 55155155 is about 7426.6516681476. The cubic root of 55155155 is about 380.6525146313.

The spelling of 55155155 in words is "fifty-five million, one hundred fifty-five thousand, one hundred fifty-five".