223129785 has 48 divisors (see below), whose sum is σ = 385506432. Its totient is φ = 109992960.

The previous prime is 223129771. The next prime is 223129789. The reversal of 223129785 is 587921322.

223129785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 223129785 - 2⁷ = 223129657 is a prime.

It is a super-3 number, since 3×223129785³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (223129789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 331209 + ... + 331881.

It is an arithmetic number, because the mean of its divisors is an integer number (8031384).

Almost surely, 2^223129785 is an apocalyptic number.

It is an amenable number.

223129785 is a deficient number, since it is larger than the sum of its proper divisors (162376647).

223129785 is a wasteful number, since it uses less digits than its factorization.

223129785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 735 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 223129785 is about 14937.5294141970. The cubic root of 223129785 is about 606.5303197927.

The spelling of 223129785 in words is "two hundred twenty-three million, one hundred twenty-nine thousand, seven hundred eighty-five".