65223128 has 16 divisors (see below), whose sum is σ = 125276760. Its totient is φ = 31816000.

The previous prime is 65223121. The next prime is 65223157. The reversal of 65223128 is 82132256.

It is a super-2 number, since 2×65223128² = 8508112852208768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65223128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65223121) 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, 99098 + ... + 99753.

Almost surely, 2^65223128 is an apocalyptic number.

It is an amenable number.

65223128 is a deficient number, since it is larger than the sum of its proper divisors (60053632).

65223128 is a wasteful number, since it uses less digits than its factorization.

65223128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198898 (or 198894 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 65223128 is about 8076.0837043706. The cubic root of 65223128 is about 402.5321204257.

The spelling of 65223128 in words is "sixty-five million, two hundred twenty-three thousand, one hundred twenty-eight".