221030010 has 24 divisors (see below), whose sum is σ = 574678260. Its totient is φ = 58941312.

The previous prime is 221030009. The next prime is 221030053. The reversal of 221030010 is 10030122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 200590569 + 20439441 = 14163^2 + 4521^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 221029974 and 221030001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1227855 + ... + 1228034.

Almost surely, 2^221030010 is an apocalyptic number.

221030010 is an abundant number, since it is smaller than the sum of its proper divisors (353648250).

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

221030010 is a wasteful number, since it uses less digits than its factorization.

221030010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455902 (or 2455899 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 221030010 is about 14867.0780585830. The cubic root of 221030010 is about 604.6217246925.

Adding to 221030010 its reverse (10030122), we get a palindrome (231060132).

The spelling of 221030010 in words is "two hundred twenty-one million, thirty thousand, ten".