1545221112 has 32 divisors (see below), whose sum is σ = 3864516480. Its totient is φ = 514878560.

The previous prime is 1545221089. The next prime is 1545221159. The reversal of 1545221112 is 2111225451.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61573 + ... + 82955.

It is an arithmetic number, because the mean of its divisors is an integer number (120766140).

Almost surely, 2^1545221112 is an apocalyptic number.

1545221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1545221112 is an abundant number, since it is smaller than the sum of its proper divisors (2319295368).

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

1545221112 is a wasteful number, since it uses less digits than its factorization.

1545221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24403 (or 24399 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 1545221112 is about 39309.3005788706. The cubic root of 1545221112 is about 1156.1039305831.

Adding to 1545221112 its reverse (2111225451), we get a palindrome (3656446563).

The spelling of 1545221112 in words is "one billion, five hundred forty-five million, two hundred twenty-one thousand, one hundred twelve".