22401355 has 4 divisors (see below), whose sum is σ = 26881632. Its totient is φ = 17921080.

The previous prime is 22401349. The next prime is 22401371. The reversal of 22401355 is 55310422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55310422 = 2 ⋅27655211.

It is not a de Polignac number, because 22401355 - 2⁷ = 22401227 is a prime.

It is a super-3 number, since 3×22401355³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2240131 + ... + 2240140.

It is an arithmetic number, because the mean of its divisors is an integer number (6720408).

Almost surely, 2^22401355 is an apocalyptic number.

22401355 is a deficient number, since it is larger than the sum of its proper divisors (4480277).

22401355 is an equidigital number, since it uses as much as digits as its factorization.

22401355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480276.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 22401355 is about 4733.0069723169. The cubic root of 22401355 is about 281.8976331500.

Adding to 22401355 its reverse (55310422), we get a palindrome (77711777).

The spelling of 22401355 in words is "twenty-two million, four hundred one thousand, three hundred fifty-five".