1163520155 has 16 divisors (see below), whose sum is σ = 1596278784. Its totient is φ = 797545440.

The previous prime is 1163520151. The next prime is 1163520199. The reversal of 1163520155 is 5510253611.

It is not a de Polignac number, because 1163520155 - 2² = 1163520151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163520151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133790 + ... + 142220.

It is an arithmetic number, because the mean of its divisors is an integer number (99767424).

Almost surely, 2^1163520155 is an apocalyptic number.

1163520155 is a deficient number, since it is larger than the sum of its proper divisors (432758629).

1163520155 is an equidigital number, since it uses as much as digits as its factorization.

1163520155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12386.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1163520155 is about 34110.4112405582. The cubic root of 1163520155 is about 1051.7793427891.

Adding to 1163520155 its reverse (5510253611), we get a palindrome (6673773766).

The spelling of 1163520155 in words is "one billion, one hundred sixty-three million, five hundred twenty thousand, one hundred fifty-five".