1121544431 has 8 divisors (see below), whose sum is σ = 1282496640. Its totient is φ = 960775128.

The previous prime is 1121544427. The next prime is 1121544433. The reversal of 1121544431 is 1344451211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121544431 - 2² = 1121544427 is a prime.

It is a super-2 number, since 2×1121544431² = 2515723821414227522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121544431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121544433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32321 + ... + 57338.

It is an arithmetic number, because the mean of its divisors is an integer number (160312080).

Almost surely, 2^1121544431 is an apocalyptic number.

1121544431 is a deficient number, since it is larger than the sum of its proper divisors (160952209).

1121544431 is an equidigital number, since it uses as much as digits as its factorization.

1121544431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91453.

The product of its digits is 1920, while the sum is 26.

The square root of 1121544431 is about 33489.4674636668. The cubic root of 1121544431 is about 1038.9759492704.

Adding to 1121544431 its reverse (1344451211), we get a palindrome (2465995642).

The spelling of 1121544431 in words is "one billion, one hundred twenty-one million, five hundred forty-four thousand, four hundred thirty-one".