1155541101 has 32 divisors (see below), whose sum is σ = 1828068480. Its totient is φ = 640032000.

The previous prime is 1155541097. The next prime is 1155541109. The reversal of 1155541101 is 1011455511.

It is not a de Polignac number, because 1155541101 - 2² = 1155541097 is a prime.

It is a super-2 number, since 2×1155541101² = 2670550472200584402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155541109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29995 + ... + 56663.

It is an arithmetic number, because the mean of its divisors is an integer number (57127140).

Almost surely, 2^1155541101 is an apocalyptic number.

1155541101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155541101 is a deficient number, since it is larger than the sum of its proper divisors (672527379).

1155541101 is a wasteful number, since it uses less digits than its factorization.

1155541101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26797.

The product of its (nonzero) digits is 500, while the sum is 24.

The square root of 1155541101 is about 33993.2508154192. The cubic root of 1155541101 is about 1049.3695689506.

Adding to 1155541101 its reverse (1011455511), we get a palindrome (2166996612).

The spelling of 1155541101 in words is "one billion, one hundred fifty-five million, five hundred forty-one thousand, one hundred one".