1153440431 has 16 divisors (see below), whose sum is σ = 1380667680. Its totient is φ = 949653120.

The previous prime is 1153440389. The next prime is 1153440437. The reversal of 1153440431 is 1340443511.

It is a happy number.

It is not a de Polignac number, because 1153440431 - 2¹⁰ = 1153439407 is a prime.

It is a super-2 number, since 2×1153440431² = 2660849655730931522, 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 1153440431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153440437) 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 15 ways as a sum of consecutive naturals, for example, 68516 + ... + 83673.

It is an arithmetic number, because the mean of its divisors is an integer number (86291730).

Almost surely, 2^1153440431 is an apocalyptic number.

1153440431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1153440431 is a deficient number, since it is larger than the sum of its proper divisors (227227249).

1153440431 is a wasteful number, since it uses less digits than its factorization.

1153440431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152266.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1153440431 is about 33962.3384206683. The cubic root of 1153440431 is about 1048.7332966712.

Adding to 1153440431 its reverse (1340443511), we get a palindrome (2493883942).

The spelling of 1153440431 in words is "one billion, one hundred fifty-three million, four hundred forty thousand, four hundred thirty-one".