221742360351 has 8 divisors (see below), whose sum is σ = 328507200560. Its totient is φ = 147828240216.

The previous prime is 221742360319. The next prime is 221742360353. The reversal of 221742360351 is 153063247122.

221742360351 is a `hidden beast` number, since 2 + 2 + 1 + 7 + 42 + 3 + 603 + 5 + 1 = 666.

It is not a de Polignac number, because 221742360351 - 2⁵ = 221742360319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221742360353) 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, 4106339980 + ... + 4106340033.

It is an arithmetic number, because the mean of its divisors is an integer number (41063400070).

Almost surely, 2^221742360351 is an apocalyptic number.

221742360351 is a deficient number, since it is larger than the sum of its proper divisors (106764840209).

221742360351 is an equidigital number, since it uses as much as digits as its factorization.

221742360351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8212680022 (or 8212680016 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 221742360351 in words is "two hundred twenty-one billion, seven hundred forty-two million, three hundred sixty thousand, three hundred fifty-one".