1151221232 has 80 divisors (see below), whose sum is σ = 2707987392. Its totient is φ = 462827520.

The previous prime is 1151221189. The next prime is 1151221273. The reversal of 1151221232 is 2321221511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709382 + ... + 711002.

Almost surely, 2^1151221232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1151221232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1353993696).

1151221232 is an abundant number, since it is smaller than the sum of its proper divisors (1556766160).

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

1151221232 is a wasteful number, since it uses less digits than its factorization.

1151221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 2020 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 1151221232 is about 33929.6512213138. The cubic root of 1151221232 is about 1048.0602834231.

Adding to 1151221232 its reverse (2321221511), we get a palindrome (3472442743).

The spelling of 1151221232 in words is "one billion, one hundred fifty-one million, two hundred twenty-one thousand, two hundred thirty-two".