1005565023 has 10 divisors (see below), whose sum is σ = 1502140464. Its totient is φ = 670376628.

The previous prime is 1005565007. The next prime is 1005565031. The reversal of 1005565023 is 3205655001.

1005565023 is a `hidden beast` number, since 1 + 0 + 0 + 5 + 5 + 650 + 2 + 3 = 666.

It is not a de Polignac number, because 1005565023 - 2⁴ = 1005565007 is a prime.

It is a super-2 number, since 2×1005565023² = 2022322030961981058, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005565523) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6207111 + ... + 6207272.

Almost surely, 2^1005565023 is an apocalyptic number.

1005565023 is a deficient number, since it is larger than the sum of its proper divisors (496575441).

1005565023 is an equidigital number, since it uses as much as digits as its factorization.

1005565023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12414395 (or 12414386 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1005565023 is about 31710.6452630658. The cubic root of 1005565023 is about 1001.8515772125.

It can be divided in two parts, 10055 and 65023, that added together give a triangular number (75078 = T₃₈₇).

The spelling of 1005565023 in words is "one billion, five million, five hundred sixty-five thousand, twenty-three".