221407345742398 has 8 divisors (see below), whose sum is σ = 346550628118608. Its totient is φ = 105890469702864.

The previous prime is 221407345742377. The next prime is 221407345742399. The reversal of 221407345742398 is 893247543704122.

221407345742398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221407345742399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2406601584111 + ... + 2406601584202.

It is an arithmetic number, because the mean of its divisors is an integer number (43318828514826).

Almost surely, 2^{221407345742398} is an apocalyptic number.

221407345742398 is a deficient number, since it is larger than the sum of its proper divisors (125143282376210).

221407345742398 is a wasteful number, since it uses less digits than its factorization.

221407345742398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813203168338.

The product of its (nonzero) digits is 81285120, while the sum is 61.

The spelling of 221407345742398 in words is "two hundred twenty-one trillion, four hundred seven billion, three hundred forty-five million, seven hundred forty-two thousand, three hundred ninety-eight".