1131244455 has 64 divisors (see below), whose sum is σ = 2023377408. Its totient is φ = 535042560.

The previous prime is 1131244453. The next prime is 1131244459. The reversal of 1131244455 is 5544421311.

It is not a de Polignac number, because 1131244455 - 2¹ = 1131244453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131244453) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2422132 + ... + 2422598.

It is an arithmetic number, because the mean of its divisors is an integer number (31615272).

Almost surely, 2^1131244455 is an apocalyptic number.

1131244455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1131244455 is a deficient number, since it is larger than the sum of its proper divisors (892132953).

1131244455 is a wasteful number, since it uses less digits than its factorization.

1131244455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816.

The product of its digits is 9600, while the sum is 30.

The square root of 1131244455 is about 33633.9776862624. The cubic root of 1131244455 is about 1041.9626569067.

Adding to 1131244455 its reverse (5544421311), we get a palindrome (6675665766).

The spelling of 1131244455 in words is "one billion, one hundred thirty-one million, two hundred forty-four thousand, four hundred fifty-five".