225640466 has 32 divisors (see below), whose sum is σ = 367053120. Its totient is φ = 103680000.

The previous prime is 225640463. The next prime is 225640469. The reversal of 225640466 is 664046522.

It is an interprime number because it is at equal distance from previous prime (225640463) and next prime (225640469).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225640463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390770 + ... + 391346.

It is an arithmetic number, because the mean of its divisors is an integer number (11470410).

Almost surely, 2^225640466 is an apocalyptic number.

225640466 is a deficient number, since it is larger than the sum of its proper divisors (141412654).

225640466 is a wasteful number, since it uses less digits than its factorization.

225640466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 225640466 is about 15021.3336957808. Note that the first 3 decimals coincide. The cubic root of 225640466 is about 608.7967555974.

Adding to 225640466 its reverse (664046522), we get a palindrome (889686988).

The spelling of 225640466 in words is "two hundred twenty-five million, six hundred forty thousand, four hundred sixty-six".