2278123557 has 8 divisors (see below), whose sum is σ = 3053237184. Its totient is φ = 1510879488.

The previous prime is 2278123469. The next prime is 2278123577. The reversal of 2278123557 is 7553218722.

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

It is not a de Polignac number, because 2278123557 - 2¹¹ = 2278121509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278123577) 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, 1966713 + ... + 1967870.

It is an arithmetic number, because the mean of its divisors is an integer number (381654648).

Almost surely, 2^2278123557 is an apocalyptic number.

It is an amenable number.

2278123557 is a deficient number, since it is larger than the sum of its proper divisors (775113627).

2278123557 is a wasteful number, since it uses less digits than its factorization.

2278123557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934779.

The product of its digits is 235200, while the sum is 42.

The square root of 2278123557 is about 47729.6926137179. The cubic root of 2278123557 is about 1315.8077043779.

The spelling of 2278123557 in words is "two billion, two hundred seventy-eight million, one hundred twenty-three thousand, five hundred fifty-seven".