22225001 has 4 divisors (see below), whose sum is σ = 23532372. Its totient is φ = 20917632.

The previous prime is 22224973. The next prime is 22225019. The reversal of 22225001 is 10052222.

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 18705625 + 3519376 = 4325^2 + 1876^2 .

It is a cyclic number.

It is not a de Polignac number, because 22225001 - 2²² = 18030697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22225081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653660 + ... + 653693.

It is an arithmetic number, because the mean of its divisors is an integer number (5883093).

Almost surely, 2^22225001 is an apocalyptic number.

It is an amenable number.

22225001 is a deficient number, since it is larger than the sum of its proper divisors (1307371).

22225001 is a wasteful number, since it uses less digits than its factorization.

22225001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307370.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 22225001 is about 4714.3399325887. The cubic root of 22225001 is about 281.1559398386.

Adding to 22225001 its reverse (10052222), we get a palindrome (32277223).

The spelling of 22225001 in words is "twenty-two million, two hundred twenty-five thousand, one".