1161331000 has 32 divisors (see below), whose sum is σ = 2717516880. Its totient is φ = 464532000.

The previous prime is 1161330967. The next prime is 1161331001. The reversal of 1161331000 is 1331611.

It is a super-2 number, since 2×1161331000² = 2697379383122000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161331001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579666 + ... + 581665.

Almost surely, 2^1161331000 is an apocalyptic number.

1161331000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161331000 is an abundant number, since it is smaller than the sum of its proper divisors (1556185880).

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

1161331000 is a wasteful number, since it uses less digits than its factorization.

1161331000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161352 (or 1161338 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1161331000 is about 34078.3068828250. The cubic root of 1161331000 is about 1051.1192901722.

Adding to 1161331000 its reverse (1331611), we get a palindrome (1162662611).

The spelling of 1161331000 in words is "one billion, one hundred sixty-one million, three hundred thirty-one thousand".