1605044223 has 12 divisors (see below), whose sum is σ = 2320685640. Its totient is φ = 1068973296.

The previous prime is 1605044197. The next prime is 1605044249. The reversal of 1605044223 is 3224405061.

It is an interprime number because it is at equal distance from previous prime (1605044197) and next prime (1605044249).

It is not a de Polignac number, because 1605044223 - 2¹³ = 1605036031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605049223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78336 + ... + 96677.

It is an arithmetic number, because the mean of its divisors is an integer number (193390470).

Almost surely, 2^1605044223 is an apocalyptic number.

1605044223 is a deficient number, since it is larger than the sum of its proper divisors (715641417).

1605044223 is a wasteful number, since it uses less digits than its factorization.

1605044223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176038 (or 176035 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1605044223 is about 40063.0031700071. The cubic root of 1605044223 is about 1170.8349223497.

Adding to 1605044223 its reverse (3224405061), we get a palindrome (4829449284).

The spelling of 1605044223 in words is "one billion, six hundred five million, forty-four thousand, two hundred twenty-three".