22603145 has 4 divisors (see below), whose sum is σ = 27123780. Its totient is φ = 18082512.

The previous prime is 22603129. The next prime is 22603171. The reversal of 22603145 is 54130622.

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 14830201 + 7772944 = 3851^2 + 2788^2 .

It is a cyclic number.

It is not a de Polignac number, because 22603145 - 2⁴ = 22603129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22603145.

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, 2260310 + ... + 2260319.

It is an arithmetic number, because the mean of its divisors is an integer number (6780945).

Almost surely, 2^22603145 is an apocalyptic number.

It is an amenable number.

22603145 is a deficient number, since it is larger than the sum of its proper divisors (4520635).

22603145 is an equidigital number, since it uses as much as digits as its factorization.

22603145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520634.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 22603145 is about 4754.2764959560. The cubic root of 22603145 is about 282.7415429669.

Adding to 22603145 its reverse (54130622), we get a palindrome (76733767).

The spelling of 22603145 in words is "twenty-two million, six hundred three thousand, one hundred forty-five".