223029146 has 4 divisors (see below), whose sum is σ = 334543722. Its totient is φ = 111514572.

The previous prime is 223029143. The next prime is 223029161. The reversal of 223029146 is 641920322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641920322 = 2 ⋅320960161.

It can be written as a sum of positive squares in only one way, i.e., 156525121 + 66504025 = 12511^2 + 8155^2 .

It is not an unprimeable number, because it can be changed into a prime (223029143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55757285 + ... + 55757288.

Almost surely, 2^223029146 is an apocalyptic number.

223029146 is a deficient number, since it is larger than the sum of its proper divisors (111514576).

223029146 is a wasteful number, since it uses less digits than its factorization.

223029146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111514575.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 223029146 is about 14934.1603714437. The cubic root of 223029146 is about 606.4391175891.

Adding to 223029146 its reverse (641920322), we get a palindrome (864949468).

The spelling of 223029146 in words is "two hundred twenty-three million, twenty-nine thousand, one hundred forty-six".