22211345 has 32 divisors (see below), whose sum is σ = 30234624. Its totient is φ = 15552000.

The previous prime is 22211339. The next prime is 22211347. The reversal of 22211345 is 54311222.

22211345 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 22211345 - 2¹⁴ = 22194961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22211347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147020 + ... + 147170.

It is an arithmetic number, because the mean of its divisors is an integer number (944832).

Almost surely, 2^22211345 is an apocalyptic number.

It is an amenable number.

22211345 is a deficient number, since it is larger than the sum of its proper divisors (8023279).

22211345 is a wasteful number, since it uses less digits than its factorization.

22211345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its digits is 480, while the sum is 20.

The square root of 22211345 is about 4712.8913630594. The cubic root of 22211345 is about 281.0983432583.

Adding to 22211345 its reverse (54311222), we get a palindrome (76522567).

The spelling of 22211345 in words is "twenty-two million, two hundred eleven thousand, three hundred forty-five".