1131324550 has 24 divisors (see below), whose sum is σ = 2109793536. Its totient is φ = 451340640.

The previous prime is 1131324527. The next prime is 1131324563. The reversal of 1131324550 is 554231311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10389 + ... + 48688.

It is an arithmetic number, because the mean of its divisors is an integer number (87908064).

Almost surely, 2^1131324550 is an apocalyptic number.

1131324550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131324550 is a deficient number, since it is larger than the sum of its proper divisors (978468986).

1131324550 is a wasteful number, since it uses less digits than its factorization.

1131324550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59472 (or 59467 counting only the distinct ones).

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

The square root of 1131324550 is about 33635.1683509983. The cubic root of 1131324550 is about 1041.9872475331.

Adding to 1131324550 its reverse (554231311), we get a palindrome (1685555861).

The spelling of 1131324550 in words is "one billion, one hundred thirty-one million, three hundred twenty-four thousand, five hundred fifty".