2221555205015 has 4 divisors (see below), whose sum is σ = 2665866246024. Its totient is φ = 1777244164008.

The previous prime is 2221555204993. The next prime is 2221555205047. The reversal of 2221555205015 is 5105025551222.

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 2221555205015 - 2²⁶ = 2221488096151 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, 222155520497 + ... + 222155520506.

It is an arithmetic number, because the mean of its divisors is an integer number (666466561506).

Almost surely, 2^{2221555205015} is an apocalyptic number.

2221555205015 is a deficient number, since it is larger than the sum of its proper divisors (444311041009).

2221555205015 is an equidigital number, since it uses as much as digits as its factorization.

2221555205015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444311041008.

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 2221555205015 in words is "two trillion, two hundred twenty-one billion, five hundred fifty-five million, two hundred five thousand, fifteen".