1155020053 has 16 divisors (see below), whose sum is σ = 1279042560. Its totient is φ = 1034233200.

The previous prime is 1155020047. The next prime is 1155020077. The reversal of 1155020053 is 3500205511.

It is not a de Polignac number, because 1155020053 - 2²⁹ = 618149141 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 (1155020023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425326 + ... + 428032.

It is an arithmetic number, because the mean of its divisors is an integer number (79940160).

Almost surely, 2^1155020053 is an apocalyptic number.

It is an amenable number.

1155020053 is a deficient number, since it is larger than the sum of its proper divisors (124022507).

1155020053 is a wasteful number, since it uses less digits than its factorization.

1155020053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 1155020053 is about 33985.5859593446. The cubic root of 1155020053 is about 1049.2118205972.

Adding to 1155020053 its reverse (3500205511), we get a palindrome (4655225564).

The spelling of 1155020053 in words is "one billion, one hundred fifty-five million, twenty thousand, fifty-three".