221411640406345 has 8 divisors (see below), whose sum is σ = 266088758935176. Its totient is φ = 176866118693376.

The previous prime is 221411640406303. The next prime is 221411640406351. The reversal of 221411640406345 is 543604046114122.

It can be written as a sum of positive squares in 4 ways, for example, as 26148690189241 + 195262950217104 = 5113579^2 + 13973652^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 221411640406345 - 2²⁷ = 221411506188617 is a prime.

It is a super-2 number, since 2×221411640406345² (a number of 29 digits) contains 22 as substring.

It is a Duffinian 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, 32899200262 + ... + 32899206991.

It is an arithmetic number, because the mean of its divisors is an integer number (33261094866897).

Almost surely, 2^{221411640406345} is an apocalyptic number.

It is an amenable number.

221411640406345 is a deficient number, since it is larger than the sum of its proper divisors (44677118528831).

221411640406345 is an equidigital number, since it uses as much as digits as its factorization.

221411640406345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65798407931.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 221411640406345 in words is "two hundred twenty-one trillion, four hundred eleven billion, six hundred forty million, four hundred six thousand, three hundred forty-five".