1131153540 has 192 divisors, whose sum is σ = 3553320960. Its totient is φ = 266560000.

The previous prime is 1131153539. The next prime is 1131153557. The reversal of 1131153540 is 453511311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131153540.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4732741 + ... + 4732979.

It is an arithmetic number, because the mean of its divisors is an integer number (18506880).

Almost surely, 2^1131153540 is an apocalyptic number.

1131153540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131153540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1776660480).

1131153540 is an abundant number, since it is smaller than the sum of its proper divisors (2422167420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131153540 is a wasteful number, since it uses less digits than its factorization.

1131153540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1131153540 is about 33632.6261240481. The cubic root of 1131153540 is about 1041.9347429362.

Adding to 1131153540 its reverse (453511311), we get a palindrome (1584664851).

The spelling of 1131153540 in words is "one billion, one hundred thirty-one million, one hundred fifty-three thousand, five hundred forty".