1131440455 has 4 divisors (see below), whose sum is σ = 1357728552. Its totient is φ = 905152360.

The previous prime is 1131440441. The next prime is 1131440461. The reversal of 1131440455 is 5540441311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1131440455 - 2⁷ = 1131440327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113144041 + ... + 113144050.

It is an arithmetic number, because the mean of its divisors is an integer number (339432138).

Almost surely, 2^1131440455 is an apocalyptic number.

1131440455 is a deficient number, since it is larger than the sum of its proper divisors (226288097).

1131440455 is an equidigital number, since it uses as much as digits as its factorization.

1131440455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226288096.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1131440455 is about 33636.8912802595. The cubic root of 1131440455 is about 1042.0228304280.

Adding to 1131440455 its reverse (5540441311), we get a palindrome (6671881766).

The spelling of 1131440455 in words is "one billion, one hundred thirty-one million, four hundred forty thousand, four hundred fifty-five".