1565240223 has 8 divisors (see below), whose sum is σ = 2087175600. Its totient is φ = 1043399168.

The previous prime is 1565240147. The next prime is 1565240239. The reversal of 1565240223 is 3220425651.

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

It is a cyclic number.

It is not a de Polignac number, because 1565240223 - 2⁸ = 1565239967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1565240023) 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, 38473 + ... + 67901.

It is an arithmetic number, because the mean of its divisors is an integer number (260896950).

Almost surely, 2^1565240223 is an apocalyptic number.

1565240223 is a deficient number, since it is larger than the sum of its proper divisors (521935377).

1565240223 is a wasteful number, since it uses less digits than its factorization.

1565240223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47161.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1565240223 is about 39563.1169525355. The cubic root of 1565240223 is about 1161.0751582931.

Adding to 1565240223 its reverse (3220425651), we get a palindrome (4785665874).

The spelling of 1565240223 in words is "one billion, five hundred sixty-five million, two hundred forty thousand, two hundred twenty-three".