1228105205515 has 8 divisors (see below), whose sum is σ = 1476923052528. Its totient is φ = 980352960480.

The previous prime is 1228105205473. The next prime is 1228105205521. The reversal of 1228105205515 is 5155025018221.

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

It is not a de Polignac number, because 1228105205515 - 2²⁷ = 1227970987787 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266397957 + ... + 266402566.

It is an arithmetic number, because the mean of its divisors is an integer number (184615381566).

Almost surely, 2^{1228105205515} is an apocalyptic number.

1228105205515 is a deficient number, since it is larger than the sum of its proper divisors (248817847013).

1228105205515 is an equidigital number, since it uses as much as digits as its factorization.

1228105205515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532800989.

The product of its (nonzero) digits is 40000, while the sum is 37.

The spelling of 1228105205515 in words is "one trillion, two hundred twenty-eight billion, one hundred five million, two hundred five thousand, five hundred fifteen".