220410621 has 12 divisors (see below), whose sum is σ = 335127520. Its totient is φ = 139206600.

The previous prime is 220410599. The next prime is 220410649. The reversal of 220410621 is 126014022.

220410621 is a `hidden beast` number, since 2 + 2 + 0 + 41 + 0 + 621 = 666.

It is not a de Polignac number, because 220410621 - 2⁶ = 220410557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220410594 and 220410603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220410721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 644305 + ... + 644646.

Almost surely, 2^220410621 is an apocalyptic number.

It is an amenable number.

220410621 is a deficient number, since it is larger than the sum of its proper divisors (114716899).

220410621 is a wasteful number, since it uses less digits than its factorization.

220410621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288976 (or 1288973 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 220410621 is about 14846.2325524020. The cubic root of 220410621 is about 604.0564222616.

Adding to 220410621 its reverse (126014022), we get a palindrome (346424643).

The spelling of 220410621 in words is "two hundred twenty million, four hundred ten thousand, six hundred twenty-one".