1228668515 has 4 divisors (see below), whose sum is σ = 1474402224. Its totient is φ = 982934808.

The previous prime is 1228668479. The next prime is 1228668547. The reversal of 1228668515 is 5158668221.

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 1228668515 - 2¹⁰ = 1228667491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122866847 + ... + 122866856.

It is an arithmetic number, because the mean of its divisors is an integer number (368600556).

Almost surely, 2^1228668515 is an apocalyptic number.

1228668515 is a deficient number, since it is larger than the sum of its proper divisors (245733709).

1228668515 is an equidigital number, since it uses as much as digits as its factorization.

1228668515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245733708.

The product of its digits is 230400, while the sum is 44.

The square root of 1228668515 is about 35052.3681796252. The cubic root of 1228668515 is about 1071.0545154739.

The spelling of 1228668515 in words is "one billion, two hundred twenty-eight million, six hundred sixty-eight thousand, five hundred fifteen".