2231545 has 4 divisors (see below), whose sum is σ = 2677860. Its totient is φ = 1785232.

The previous prime is 2231533. The next prime is 2231587. The reversal of 2231545 is 5451322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 674041 + 1557504 = 821^2 + 1248^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231545 - 2¹¹ = 2229497 is a prime.

It is a super-3 number, since 3×2231545³ = 33337897093155610875, which contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223150 + ... + 223159.

It is an arithmetic number, because the mean of its divisors is an integer number (669465).

2^2231545 is an apocalyptic number.

It is an amenable number.

2231545 is a deficient number, since it is larger than the sum of its proper divisors (446315).

2231545 is an equidigital number, since it uses as much as digits as its factorization.

2231545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446314.

The product of its digits is 1200, while the sum is 22.

The square root of 2231545 is about 1493.8356669996. The cubic root of 2231545 is about 130.6778206442.

Adding to 2231545 its reverse (5451322), we get a palindrome (7682867).

The spelling of 2231545 in words is "two million, two hundred thirty-one thousand, five hundred forty-five".