18153229 has 4 divisors (see below), whose sum is σ = 19221084. Its totient is φ = 17085376.

The previous prime is 18153193. The next prime is 18153251. The reversal of 18153229 is 92235181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92235181 = 577 ⋅159853.

It can be written as a sum of positive squares in 2 ways, for example, as 9597604 + 8555625 = 3098^2 + 2925^2 .

It is a cyclic number.

It is not a de Polignac number, because 18153229 - 2¹¹ = 18151181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18153229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18153329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533902 + ... + 533935.

It is an arithmetic number, because the mean of its divisors is an integer number (4805271).

Almost surely, 2^18153229 is an apocalyptic number.

It is an amenable number.

18153229 is a deficient number, since it is larger than the sum of its proper divisors (1067855).

18153229 is a wasteful number, since it uses less digits than its factorization.

18153229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067854.

The product of its digits is 4320, while the sum is 31.

The square root of 18153229 is about 4260.6606295268. The cubic root of 18153229 is about 262.8156939522.

The spelling of 18153229 in words is "eighteen million, one hundred fifty-three thousand, two hundred twenty-nine".