1153540431 has 12 divisors (see below), whose sum is σ = 1673199840. Its totient is φ = 765807840.

The previous prime is 1153540397. The next prime is 1153540441. The reversal of 1153540431 is 1340453511.

It is a happy number.

1153540431 is a `hidden beast` number, since 115 + 3 + 540 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 1153540431 - 2²² = 1149346127 is a prime.

It is a super-2 number, since 2×1153540431² = 2661311051903331522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1153540395 and 1153540404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153540441) 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 11 ways as a sum of consecutive naturals, for example, 265990 + ... + 270291.

It is an arithmetic number, because the mean of its divisors is an integer number (139433320).

Almost surely, 2^1153540431 is an apocalyptic number.

1153540431 is a deficient number, since it is larger than the sum of its proper divisors (519659409).

1153540431 is a wasteful number, since it uses less digits than its factorization.

1153540431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536526 (or 536523 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1153540431 is about 33963.8106077631. The cubic root of 1153540431 is about 1048.7636031919.

Adding to 1153540431 its reverse (1340453511), we get a palindrome (2493993942).

The spelling of 1153540431 in words is "one billion, one hundred fifty-three million, five hundred forty thousand, four hundred thirty-one".