220210135506 has 48 divisors (see below), whose sum is σ = 489320653536. Its totient is φ = 71534369088.

The previous prime is 220210135499. The next prime is 220210135589. The reversal of 220210135506 is 605531012022.

It is a happy number.

220210135506 is a `hidden beast` number, since 2 + 2 + 0 + 2 + 101 + 3 + 550 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 220210135506.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21766 + ... + 663998.

It is an arithmetic number, because the mean of its divisors is an integer number (10194180282).

Almost surely, 2^220210135506 is an apocalyptic number.

220210135506 is an abundant number, since it is smaller than the sum of its proper divisors (269110518030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220210135506 is a wasteful number, since it uses less digits than its factorization.

220210135506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642727 (or 642724 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 220210135506 its reverse (605531012022), we get a palindrome (825741147528).

The spelling of 220210135506 in words is "two hundred twenty billion, two hundred ten million, one hundred thirty-five thousand, five hundred six".