1131450523 has 24 divisors (see below), whose sum is σ = 1376530848. Its totient is φ = 925537536.

The previous prime is 1131450499. The next prime is 1131450539. The reversal of 1131450523 is 3250541311.

It is a happy number.

It is not a de Polignac number, because 1131450523 - 2²¹ = 1129353371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131450823) 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 23 ways as a sum of consecutive naturals, for example, 667465 + ... + 669157.

It is an arithmetic number, because the mean of its divisors is an integer number (57355452).

Almost surely, 2^1131450523 is an apocalyptic number.

1131450523 is a deficient number, since it is larger than the sum of its proper divisors (245080325).

1131450523 is a wasteful number, since it uses less digits than its factorization.

1131450523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323 (or 2316 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1131450523 is about 33637.0409370384. The cubic root of 1131450523 is about 1042.0259211945.

Adding to 1131450523 its reverse (3250541311), we get a palindrome (4381991834).

The spelling of 1131450523 in words is "one billion, one hundred thirty-one million, four hundred fifty thousand, five hundred twenty-three".