2221663493 has 16 divisors (see below), whose sum is σ = 2587881984. Its totient is φ = 1867829760.

The previous prime is 2221663489. The next prime is 2221663529. The reversal of 2221663493 is 3943661222.

It is not a de Polignac number, because 2221663493 - 2² = 2221663489 is a prime.

It is a super-2 number, since 2×2221663493² = 9871577352257922098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221663193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149621 + ... + 163797.

It is an arithmetic number, because the mean of its divisors is an integer number (161742624).

Almost surely, 2^2221663493 is an apocalyptic number.

It is an amenable number.

2221663493 is a deficient number, since it is larger than the sum of its proper divisors (366218491).

2221663493 is a wasteful number, since it uses less digits than its factorization.

2221663493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14612.

The product of its digits is 93312, while the sum is 38.

The square root of 2221663493 is about 47134.5254882236. The cubic root of 2221663493 is about 1304.8465036747.

The spelling of 2221663493 in words is "two billion, two hundred twenty-one million, six hundred sixty-three thousand, four hundred ninety-three".