221441430 has 32 divisors (see below), whose sum is σ = 607382784. Its totient is φ = 50615136.

The previous prime is 221441413. The next prime is 221441431. The reversal of 221441430 is 34144122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 221441397 and 221441406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221441431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527032 + ... + 527451.

It is an arithmetic number, because the mean of its divisors is an integer number (18980712).

Almost surely, 2^221441430 is an apocalyptic number.

221441430 is an abundant number, since it is smaller than the sum of its proper divisors (385941354).

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

221441430 is a wasteful number, since it uses less digits than its factorization.

221441430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054500.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 221441430 is about 14880.9082384107. The cubic root of 221441430 is about 604.9966350017.

Adding to 221441430 its reverse (34144122), we get a palindrome (255585552).

The spelling of 221441430 in words is "two hundred twenty-one million, four hundred forty-one thousand, four hundred thirty".