2221545 has 16 divisors (see below), whose sum is σ = 3677760. Its totient is φ = 1143744.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221545 is 5451222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2221523) and next prime (2221567).

It is not a de Polignac number, because 2221545 - 2¹⁰ = 2220521 is a prime.

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, 2119 + ... + 2988.

It is an arithmetic number, because the mean of its divisors is an integer number (229860).

2^2221545 is an apocalyptic number.

It is an amenable number.

2221545 is a deficient number, since it is larger than the sum of its proper divisors (1456215).

2221545 is a wasteful number, since it uses less digits than its factorization.

2221545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144.

The product of its digits is 800, while the sum is 21.

The square root of 2221545 is about 1490.4848204527. The cubic root of 2221545 is about 130.4823305153.

Adding to 2221545 its reverse (5451222), we get a palindrome (7672767).

The spelling of 2221545 in words is "two million, two hundred twenty-one thousand, five hundred forty-five".