221377743 has 12 divisors (see below), whose sum is σ = 320239608. Its totient is φ = 147367440.

The previous prime is 221377711. The next prime is 221377763. The reversal of 221377743 is 347773122.

It is a happy number.

It is not a de Polignac number, because 221377743 - 2⁵ = 221377711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221377698 and 221377707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221377763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11580 + ... + 24017.

It is an arithmetic number, because the mean of its divisors is an integer number (26686634).

Almost surely, 2^221377743 is an apocalyptic number.

221377743 is a deficient number, since it is larger than the sum of its proper divisors (98861865).

221377743 is a wasteful number, since it uses less digits than its factorization.

221377743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36294 (or 36291 counting only the distinct ones).

The product of its digits is 49392, while the sum is 36.

The square root of 221377743 is about 14878.7681949817. The cubic root of 221377743 is about 604.9386300248.

The spelling of 221377743 in words is "two hundred twenty-one million, three hundred seventy-seven thousand, seven hundred forty-three".