220512406 has 8 divisors (see below), whose sum is σ = 350225640. Its totient is φ = 103770528.

The previous prime is 220512379. The next prime is 220512407. The reversal of 220512406 is 604215022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220512407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3242796 + ... + 3242863.

It is an arithmetic number, because the mean of its divisors is an integer number (43778205).

Almost surely, 2^220512406 is an apocalyptic number.

220512406 is a deficient number, since it is larger than the sum of its proper divisors (129713234).

220512406 is a wasteful number, since it uses less digits than its factorization.

220512406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6485678.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 220512406 is about 14849.6601307909. The cubic root of 220512406 is about 604.1493917999.

Adding to 220512406 its reverse (604215022), we get a palindrome (824727428).

The spelling of 220512406 in words is "two hundred twenty million, five hundred twelve thousand, four hundred six".