1131243330 has 32 divisors (see below), whose sum is σ = 3102839424. Its totient is φ = 258569856.

The previous prime is 1131243319. The next prime is 1131243331. The reversal of 1131243330 is 333421311.

It is a super-2 number, since 2×1131243330² = 2559422943338977800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1131243297 and 1131243306.

It is not an unprimeable number, because it can be changed into a prime (1131243331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2693227 + ... + 2693646.

It is an arithmetic number, because the mean of its divisors is an integer number (96963732).

Almost surely, 2^1131243330 is an apocalyptic number.

1131243330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131243330 is an abundant number, since it is smaller than the sum of its proper divisors (1971596094).

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

1131243330 is a wasteful number, since it uses less digits than its factorization.

1131243330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386890.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1131243330 is about 33633.9609620990. The cubic root of 1131243330 is about 1041.9623115029.

Adding to 1131243330 its reverse (333421311), we get a palindrome (1464664641).

The spelling of 1131243330 in words is "one billion, one hundred thirty-one million, two hundred forty-three thousand, three hundred thirty".