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55115155 = 511023031
BaseRepresentation
bin1101001000111…
…1110110010011
310211201010210001
43102033312103
5103102141110
65245150431
71236320404
oct322176623
9124633701
1055115155
1129124917
121655b417
13b559724
1474699ab
154c8a63a
hex348fd93

55115155 has 4 divisors (see below), whose sum is σ = 66138192. Its totient is φ = 44092120.

The previous prime is 55115149. The next prime is 55115183. The reversal of 55115155 is 55151155.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2k-55115155 is a prime.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5511511 + ... + 5511520.

It is an arithmetic number, because the mean of its divisors is an integer number (16534548).

Almost surely, 255115155 is an apocalyptic number.

55115155 is a deficient number, since it is larger than the sum of its proper divisors (11023037).

55115155 is a wasteful number, since it uses less digits than its factorization.

55115155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11023036.

The product of its digits is 3125, while the sum is 28.

The square root of 55115155 is about 7423.9581760675. The cubic root of 55115155 is about 380.5604725677.

The spelling of 55115155 in words is "fifty-five million, one hundred fifteen thousand, one hundred fifty-five".

Divisors: 1 5 11023031 55115155