2193581405 has 4 divisors (see below), whose sum is σ = 2632297692. Its totient is φ = 1754865120.

The previous prime is 2193581389. The next prime is 2193581419. The reversal of 2193581405 is 5041853912.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 351712516 + 1841868889 = 18754^2 + 42917^2 .

It is not a de Polignac number, because 2193581405 - 2⁴ = 2193581389 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, 219358136 + ... + 219358145.

It is an arithmetic number, because the mean of its divisors is an integer number (658074423).

Almost surely, 2^2193581405 is an apocalyptic number.

It is an amenable number.

2193581405 is a deficient number, since it is larger than the sum of its proper divisors (438716287).

2193581405 is an equidigital number, since it uses as much as digits as its factorization.

2193581405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438716286.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 2193581405 is about 46835.6851663344. The cubic root of 2193581405 is about 1299.3253708721.

The spelling of 2193581405 in words is "two billion, one hundred ninety-three million, five hundred eighty-one thousand, four hundred five".