1228178015 has 4 divisors (see below), whose sum is σ = 1473813624. Its totient is φ = 982542408.

The previous prime is 1228177999. The next prime is 1228178023. The reversal of 1228178015 is 5108718221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5108718221 = 151 ⋅33832571.

It is a cyclic number.

It is not a de Polignac number, because 1228178015 - 2⁴ = 1228177999 is a prime.

It is a Duffinian number.

It is a congruent 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, 122817797 + ... + 122817806.

It is an arithmetic number, because the mean of its divisors is an integer number (368453406).

Almost surely, 2^1228178015 is an apocalyptic number.

1228178015 is a deficient number, since it is larger than the sum of its proper divisors (245635609).

1228178015 is an equidigital number, since it uses as much as digits as its factorization.

1228178015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245635608.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 1228178015 is about 35045.3708069982. The cubic root of 1228178015 is about 1070.9119703371.

The spelling of 1228178015 in words is "one billion, two hundred twenty-eight million, one hundred seventy-eight thousand, fifteen".