2447155 has 4 divisors (see below), whose sum is σ = 2936592. Its totient is φ = 1957720.

The previous prime is 2447153. The next prime is 2447161. The reversal of 2447155 is 5517442.

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

It is not a de Polignac number, because 2447155 - 2¹ = 2447153 is a prime.

It is a Duffinian number.

2447155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2447153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244711 + ... + 244720.

It is an arithmetic number, because the mean of its divisors is an integer number (734148).

2^2447155 is an apocalyptic number.

2447155 is a deficient number, since it is larger than the sum of its proper divisors (489437).

2447155 is an equidigital number, since it uses as much as digits as its factorization.

2447155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489436.

The product of its digits is 5600, while the sum is 28.

The square root of 2447155 is about 1564.3385183521. The cubic root of 2447155 is about 134.7577732294.

The spelling of 2447155 in words is "two million, four hundred forty-seven thousand, one hundred fifty-five".