221377340 has 12 divisors (see below), whose sum is σ = 464892456. Its totient is φ = 88550928.

The previous prime is 221377339. The next prime is 221377363. The reversal of 221377340 is 43773122.

221377340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×221377340³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5534414 + ... + 5534453.

It is an arithmetic number, because the mean of its divisors is an integer number (38741038).

Almost surely, 2^221377340 is an apocalyptic number.

221377340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221377340 is an abundant number, since it is smaller than the sum of its proper divisors (243515116).

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

221377340 is a wasteful number, since it uses less digits than its factorization.

221377340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11068876 (or 11068874 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 221377340 is about 14878.7546521878. The cubic root of 221377340 is about 604.9382629442.

The spelling of 221377340 in words is "two hundred twenty-one million, three hundred seventy-seven thousand, three hundred forty".