221023010 has 64 divisors (see below), whose sum is σ = 461704320. Its totient is φ = 75479040.

The previous prime is 221023003. The next prime is 221023013. The reversal of 221023010 is 10320122.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221022982 and 221023000.

It is not an unprimeable number, because it can be changed into a prime (221023013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105170 + ... + 107250.

It is an arithmetic number, because the mean of its divisors is an integer number (7214130).

Almost surely, 2^221023010 is an apocalyptic number.

221023010 is an abundant number, since it is smaller than the sum of its proper divisors (240681310).

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

221023010 is a wasteful number, since it uses less digits than its factorization.

221023010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 221023010 is about 14866.8426372246. The cubic root of 221023010 is about 604.6153418538.

Adding to 221023010 its reverse (10320122), we get a palindrome (231343132).

The spelling of 221023010 in words is "two hundred twenty-one million, twenty-three thousand, ten".