2278451819 has 4 divisors (see below), whose sum is σ = 2603944944. Its totient is φ = 1952958696.

The previous prime is 2278451771. The next prime is 2278451831. The reversal of 2278451819 is 9181548722.

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

It is a cyclic number.

It is not a de Polignac number, because 2278451819 - 2²⁴ = 2261674603 is a prime.

It is a super-2 number, since 2×2278451819² = 10382685383008817522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2278451839) 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, 162746552 + ... + 162746565.

It is an arithmetic number, because the mean of its divisors is an integer number (650986236).

Almost surely, 2^2278451819 is an apocalyptic number.

2278451819 is a deficient number, since it is larger than the sum of its proper divisors (325493125).

2278451819 is an equidigital number, since it uses as much as digits as its factorization.

2278451819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325493124.

The product of its digits is 322560, while the sum is 47.

The square root of 2278451819 is about 47733.1312507361. The cubic root of 2278451819 is about 1315.8709009684.

The spelling of 2278451819 in words is "two billion, two hundred seventy-eight million, four hundred fifty-one thousand, eight hundred nineteen".