1155541331 has 8 divisors (see below), whose sum is σ = 1320841824. Its totient is φ = 990296640.

The previous prime is 1155541327. The next prime is 1155541363. The reversal of 1155541331 is 1331455511.

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 1155541331 - 2² = 1155541327 is a prime.

It is a super-2 number, since 2×1155541331² = 2670551535298503122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1155541294 and 1155541303.

It is not an unprimeable number, because it can be changed into a prime (1155541381) 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, 49961 + ... + 69333.

It is an arithmetic number, because the mean of its divisors is an integer number (165105228).

Almost surely, 2^1155541331 is an apocalyptic number.

1155541331 is a deficient number, since it is larger than the sum of its proper divisors (165300493).

1155541331 is an equidigital number, since it uses as much as digits as its factorization.

1155541331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27901.

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

The square root of 1155541331 is about 33993.2541984435. The cubic root of 1155541331 is about 1049.3696385731.

Adding to 1155541331 its reverse (1331455511), we get a palindrome (2486996842).

The spelling of 1155541331 in words is "one billion, one hundred fifty-five million, five hundred forty-one thousand, three hundred thirty-one".