2215045021 has 4 divisors (see below), whose sum is σ = 2531480032. Its totient is φ = 1898610012.

The previous prime is 2215044901. The next prime is 2215045031. The reversal of 2215045021 is 1205405122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2215045021 - 2⁷ = 2215044893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2215044983 and 2215045001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215045031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158217495 + ... + 158217508.

It is an arithmetic number, because the mean of its divisors is an integer number (632870008).

Almost surely, 2^2215045021 is an apocalyptic number.

It is an amenable number.

2215045021 is a deficient number, since it is larger than the sum of its proper divisors (316435011).

2215045021 is an equidigital number, since it uses as much as digits as its factorization.

2215045021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316435010.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2215045021 is about 47064.2647982522. The cubic root of 2215045021 is about 1303.5494755526.

The spelling of 2215045021 in words is "two billion, two hundred fifteen million, forty-five thousand, twenty-one".