2216455121 has 8 divisors (see below), whose sum is σ = 2404075464. Its totient is φ = 2035194880.

The previous prime is 2216455117. The next prime is 2216455133. The reversal of 2216455121 is 1215546122.

It can be written as a sum of positive squares in 4 ways, for example, as 509856400 + 1706598721 = 22580^2 + 41311^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2216455121 - 2² = 2216455117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216455321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1589300 + ... + 1590693.

It is an arithmetic number, because the mean of its divisors is an integer number (300509433).

Almost surely, 2^2216455121 is an apocalyptic number.

It is an amenable number.

2216455121 is a deficient number, since it is larger than the sum of its proper divisors (187620343).

2216455121 is a wasteful number, since it uses less digits than its factorization.

2216455121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180051.

The product of its digits is 4800, while the sum is 29.

The square root of 2216455121 is about 47079.2429951884. The cubic root of 2216455121 is about 1303.8260305335.

The spelling of 2216455121 in words is "two billion, two hundred sixteen million, four hundred fifty-five thousand, one hundred twenty-one".