22201397 has 4 divisors (see below), whose sum is σ = 22258860. Its totient is φ = 22143936.

The previous prime is 22201393. The next prime is 22201409. The reversal of 22201397 is 79310222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79310222 = 2 ⋅39655111.

It can be written as a sum of positive squares in 2 ways, for example, as 11383876 + 10817521 = 3374^2 + 3289^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201397 - 2² = 22201393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28148 + ... + 28925.

It is an arithmetic number, because the mean of its divisors is an integer number (5564715).

Almost surely, 2^22201397 is an apocalyptic number.

It is an amenable number.

22201397 is a deficient number, since it is larger than the sum of its proper divisors (57463).

22201397 is an equidigital number, since it uses as much as digits as its factorization.

22201397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57462.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 22201397 is about 4711.8358417925. The cubic root of 22201397 is about 281.0563709554.

The spelling of 22201397 in words is "twenty-two million, two hundred one thousand, three hundred ninety-seven".