11221545 has 16 divisors (see below), whose sum is σ = 18440640. Its totient is φ = 5822784.

The previous prime is 11221523. The next prime is 11221549. The reversal of 11221545 is 54512211.

11221545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11221545 - 2⁶ = 11221481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221549) 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, 9555 + ... + 10664.

It is an arithmetic number, because the mean of its divisors is an integer number (1152540).

Almost surely, 2^11221545 is an apocalyptic number.

11221545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11221545 is a deficient number, since it is larger than the sum of its proper divisors (7219095).

11221545 is a wasteful number, since it uses less digits than its factorization.

11221545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20264.

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

The square root of 11221545 is about 3349.8574596541. The cubic root of 11221545 is about 223.8811617196.

Adding to 11221545 its reverse (54512211), we get a palindrome (65733756).

The spelling of 11221545 in words is "eleven million, two hundred twenty-one thousand, five hundred forty-five".