1155220023 has 8 divisors (see below), whose sum is σ = 1630898928. Its totient is φ = 724843904.

The previous prime is 1155220021. The next prime is 1155220039. The reversal of 1155220023 is 3200225511.

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 1155220023 - 2¹ = 1155220021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155220021) 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, 11325636 + ... + 11325737.

It is an arithmetic number, because the mean of its divisors is an integer number (203862366).

Almost surely, 2^1155220023 is an apocalyptic number.

1155220023 is a deficient number, since it is larger than the sum of its proper divisors (475678905).

1155220023 is a wasteful number, since it uses less digits than its factorization.

1155220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22651393.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1155220023 is about 33988.5278145435. The cubic root of 1155220023 is about 1049.2723675347.

Adding to 1155220023 its reverse (3200225511), we get a palindrome (4355445534).

The spelling of 1155220023 in words is "one billion, one hundred fifty-five million, two hundred twenty thousand, twenty-three".