1165332220 has 24 divisors (see below), whose sum is σ = 2635444224. Its totient is φ = 430276416.

The previous prime is 1165332211. The next prime is 1165332229. The reversal of 1165332220 is 222335611.

It is an interprime number because it is at equal distance from previous prime (1165332211) and next prime (1165332229).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165332229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240764 + ... + 2241283.

It is an arithmetic number, because the mean of its divisors is an integer number (109810176).

Almost surely, 2^1165332220 is an apocalyptic number.

1165332220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165332220 is an abundant number, since it is smaller than the sum of its proper divisors (1470112004).

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

1165332220 is a wasteful number, since it uses less digits than its factorization.

1165332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482069 (or 4482067 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1165332220 is about 34136.9626651230. The cubic root of 1165332220 is about 1052.3250729083.

Adding to 1165332220 its reverse (222335611), we get a palindrome (1387667831).

The spelling of 1165332220 in words is "one billion, one hundred sixty-five million, three hundred thirty-two thousand, two hundred twenty".