224169138 has 18 divisors (see below), whose sum is σ = 485837469. Its totient is φ = 74701872.

The previous prime is 224169137. The next prime is 224169149. The reversal of 224169138 is 831961422.

224169138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 177342489 + 46826649 = 13317^2 + 6843^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10587.

It is not an unprimeable number, because it can be changed into a prime (224169131) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 61758 + ... + 65286.

Almost surely, 2^224169138 is an apocalyptic number.

224169138 is an abundant number, since it is smaller than the sum of its proper divisors (261668331).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

224169138 is an frugal number, since it uses more digits than its factorization.

224169138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7066 (or 3534 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 224169138 is about 14972.2789848440. The cubic root of 224169138 is about 607.4706138303.

The spelling of 224169138 in words is "two hundred twenty-four million, one hundred sixty-nine thousand, one hundred thirty-eight".