2221693491 has 8 divisors (see below), whose sum is σ = 2962493440. Its totient is φ = 1481011272.

The previous prime is 2221693469. The next prime is 2221693531. The reversal of 2221693491 is 1943961222.

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

It is not a de Polignac number, because 2221693491 - 2⁵ = 2221693459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221693421) 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, 34350 + ... + 74988.

It is an arithmetic number, because the mean of its divisors is an integer number (370311680).

Almost surely, 2^2221693491 is an apocalyptic number.

2221693491 is a deficient number, since it is larger than the sum of its proper divisors (740799949).

2221693491 is a wasteful number, since it uses less digits than its factorization.

2221693491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58865.

The product of its digits is 46656, while the sum is 39.

The square root of 2221693491 is about 47134.8437039946. The cubic root of 2221693491 is about 1304.8523765427.

The spelling of 2221693491 in words is "two billion, two hundred twenty-one million, six hundred ninety-three thousand, four hundred ninety-one".