22152505 has 8 divisors (see below), whose sum is σ = 27231624. Its totient is φ = 17289600.

The previous prime is 22152467. The next prime is 22152509. The reversal of 22152505 is 50525122.

It can be written as a sum of positive squares in 4 ways, for example, as 446224 + 21706281 = 668^2 + 4659^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-22152505 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22152509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53826 + ... + 54235.

It is an arithmetic number, because the mean of its divisors is an integer number (3403953).

Almost surely, 2^22152505 is an apocalyptic number.

It is an amenable number.

22152505 is a deficient number, since it is larger than the sum of its proper divisors (5079119).

22152505 is a wasteful number, since it uses less digits than its factorization.

22152505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108107.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 22152505 is about 4706.6447709595. The cubic root of 22152505 is about 280.8499048552.

Adding to 22152505 its reverse (50525122), we get a palindrome (72677627).

The spelling of 22152505 in words is "twenty-two million, one hundred fifty-two thousand, five hundred five".