221377442 has 16 divisors (see below), whose sum is σ = 390120192. Its totient is φ = 92885520.

The previous prime is 221377441. The next prime is 221377463. The reversal of 221377442 is 244773122.

221377442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221377399 and 221377408.

It is not an unprimeable number, because it can be changed into a prime (221377441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386738 + ... + 387309.

It is an arithmetic number, because the mean of its divisors is an integer number (24382512).

Almost surely, 2^221377442 is an apocalyptic number.

221377442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221377442 is a deficient number, since it is larger than the sum of its proper divisors (168742750).

221377442 is a wasteful number, since it uses less digits than its factorization.

221377442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774073.

The product of its digits is 18816, while the sum is 32.

The square root of 221377442 is about 14878.7580798936. The cubic root of 221377442 is about 604.9383558530.

The spelling of 221377442 in words is "two hundred twenty-one million, three hundred seventy-seven thousand, four hundred forty-two".