221441340 has 24 divisors (see below), whose sum is σ = 620035920. Its totient is φ = 59051008.

The previous prime is 221441237. The next prime is 221441377. The reversal of 221441340 is 43144122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1845285 + ... + 1845404.

It is an arithmetic number, because the mean of its divisors is an integer number (25834830).

Almost surely, 2^221441340 is an apocalyptic number.

221441340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221441340 is an abundant number, since it is smaller than the sum of its proper divisors (398594580).

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

221441340 is a wasteful number, since it uses less digits than its factorization.

221441340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690701 (or 3690699 counting only the distinct ones).

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

The square root of 221441340 is about 14880.9052144014. The cubic root of 221441340 is about 604.9965530391.

Adding to 221441340 its reverse (43144122), we get a palindrome (264585462).

The spelling of 221441340 in words is "two hundred twenty-one million, four hundred forty-one thousand, three hundred forty".