22113145 has 16 divisors (see below), whose sum is σ = 27352080. Its totient is φ = 17152000.

The previous prime is 22113121. The next prime is 22113151. The reversal of 22113145 is 54131122.

It can be written as a sum of positive squares in 8 ways, for example, as 1610361 + 20502784 = 1269^2 + 4528^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22113145 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, 54945 + ... + 55345.

It is an arithmetic number, because the mean of its divisors is an integer number (1709505).

Almost surely, 2^22113145 is an apocalyptic number.

It is an amenable number.

22113145 is a deficient number, since it is larger than the sum of its proper divisors (5238935).

22113145 is a wasteful number, since it uses less digits than its factorization.

22113145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its digits is 240, while the sum is 19.

The square root of 22113145 is about 4702.4615894231. The cubic root of 22113145 is about 280.6834706198.

Adding to 22113145 its reverse (54131122), we get a palindrome (76244267).

It can be divided in two parts, 2211 and 3145, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 22113145 in words is "twenty-two million, one hundred thirteen thousand, one hundred forty-five".