1655265223 has 4 divisors (see below), whose sum is σ = 1690483680. Its totient is φ = 1620046768.

The previous prime is 1655265203. The next prime is 1655265229. The reversal of 1655265223 is 3225625561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3225625561 = 15527 ⋅207743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1655265223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655265229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17609158 + ... + 17609251.

It is an arithmetic number, because the mean of its divisors is an integer number (422620920).

Almost surely, 2^1655265223 is an apocalyptic number.

1655265223 is a deficient number, since it is larger than the sum of its proper divisors (35218457).

1655265223 is an equidigital number, since it uses as much as digits as its factorization.

1655265223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35218456.

The product of its digits is 108000, while the sum is 37.

The square root of 1655265223 is about 40684.9508172248. The cubic root of 1655265223 is about 1182.9213317711.

The spelling of 1655265223 in words is "one billion, six hundred fifty-five million, two hundred sixty-five thousand, two hundred twenty-three".