1145510220 has 48 divisors (see below), whose sum is σ = 3209488128. Its totient is φ = 305273280.

The previous prime is 1145510203. The next prime is 1145510227. The reversal of 1145510220 is 220155411.

It is not an unprimeable number, because it can be changed into a prime (1145510227) 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, 104647 + ... + 115073.

It is an arithmetic number, because the mean of its divisors is an integer number (66864336).

Almost surely, 2^1145510220 is an apocalyptic number.

1145510220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145510220 is an abundant number, since it is smaller than the sum of its proper divisors (2063977908).

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

1145510220 is a wasteful number, since it uses less digits than its factorization.

1145510220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270 (or 12268 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1145510220 is about 33845.3869825712. The cubic root of 1145510220 is about 1046.3243269410.

Adding to 1145510220 its reverse (220155411), we get a palindrome (1365665631).

The spelling of 1145510220 in words is "one billion, one hundred forty-five million, five hundred ten thousand, two hundred twenty".