1131541215 has 64 divisors (see below), whose sum is σ = 2170589184. Its totient is φ = 492507648.

The previous prime is 1131541183. The next prime is 1131541217. The reversal of 1131541215 is 5121451311.

It is not a de Polignac number, because 1131541215 - 2⁵ = 1131541183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131541217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 179497 + ... + 185693.

It is an arithmetic number, because the mean of its divisors is an integer number (33915456).

Almost surely, 2^1131541215 is an apocalyptic number.

1131541215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1131541215 is a deficient number, since it is larger than the sum of its proper divisors (1039047969).

1131541215 is a wasteful number, since it uses less digits than its factorization.

1131541215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296.

The product of its digits is 600, while the sum is 24.

The square root of 1131541215 is about 33638.3890072043. The cubic root of 1131541215 is about 1042.0537618257.

Adding to 1131541215 its reverse (5121451311), we get a palindrome (6252992526).

The spelling of 1131541215 in words is "one billion, one hundred thirty-one million, five hundred forty-one thousand, two hundred fifteen".