221460340 has 24 divisors (see below), whose sum is σ = 465534720. Its totient is φ = 88495008.

The previous prime is 221460329. The next prime is 221460367. The reversal of 221460340 is 43064122.

It is a happy number.

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, 17041 + ... + 27079.

It is an arithmetic number, because the mean of its divisors is an integer number (19397280).

Almost surely, 2^221460340 is an apocalyptic number.

221460340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221460340 is an abundant number, since it is smaller than the sum of its proper divisors (244074380).

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

221460340 is a wasteful number, since it uses less digits than its factorization.

221460340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11151 (or 11149 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 221460340 is about 14881.5436027315. The cubic root of 221460340 is about 605.0138557490.

The spelling of 221460340 in words is "two hundred twenty-one million, four hundred sixty thousand, three hundred forty".