221385742386830 has 16 divisors (see below), whose sum is σ = 455422098624480. Its totient is φ = 75903683104032.

The previous prime is 221385742386779. The next prime is 221385742386871. The reversal of 221385742386830 is 38683247583122.

It is a super-4 number, since 4×221385742386830⁴ (a number of 58 digits) contains 4444 as substring.

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, 1581326731265 + ... + 1581326731404.

It is an arithmetic number, because the mean of its divisors is an integer number (28463881164030).

Almost surely, 2^{221385742386830} is an apocalyptic number.

221385742386830 is an abundant number, since it is smaller than the sum of its proper divisors (234036356237650).

221385742386830 is a wasteful number, since it uses less digits than its factorization.

221385742386830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162653462683.

The product of its (nonzero) digits is 92897280, while the sum is 62.

The spelling of 221385742386830 in words is "two hundred twenty-one trillion, three hundred eighty-five billion, seven hundred forty-two million, three hundred eighty-six thousand, eight hundred thirty".