22400145 has 80 divisors (see below), whose sum is σ = 43908480. Its totient is φ = 10886400.

The previous prime is 22400111. The next prime is 22400149. The reversal of 22400145 is 54100422.

It is not a de Polignac number, because 22400145 - 2⁸ = 22399889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22400149) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 315460 + ... + 315530.

It is an arithmetic number, because the mean of its divisors is an integer number (548856).

Almost surely, 2^22400145 is an apocalyptic number.

It is an amenable number.

22400145 is a deficient number, since it is larger than the sum of its proper divisors (21508335).

22400145 is a wasteful number, since it uses less digits than its factorization.

22400145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22400145 is about 4732.8791448758. The cubic root of 22400145 is about 281.8925575303.

Adding to 22400145 its reverse (54100422), we get a palindrome (76500567).

The spelling of 22400145 in words is "twenty-two million, four hundred thousand, one hundred forty-five".